Showing posts with label Audio Cables. Show all posts
Showing posts with label Audio Cables. Show all posts

Saturday, 14 September 2024

Pacific Audio Fest 2024: Part I. [And expensive speaker cables unanimously turned down in a blind test?! 😕]


This is the third year for the Pacific Audio Fest which first started in 2022, basically after the COVID-19 pandemic reopenings. I think the first 2 years of the show were quite similar in size but this third show is clearly a smaller event with fewer display rooms and less stalls in the Marketplace. Correlated with that, I also noticed fewer headphone set-ups to try out.

To be honest, while I think this probably was disappointing for some, I only had a couple of days to visit anyways so this actually worked out driving into Seattle on Saturday morning, stayed a night, and got home by later afternoon Sunday having felt like I spent enough time in each room, even visiting a few of the rooms a number of times to compare.

So, let's have a peek at some audiophile eye-candy and consider the goods out on display this year. Let's be honest, one of the most important specs whenever doing any shopping is the asking price. Unless specified otherwise, all prices are in USD.

The show ran from September 6-8, 2024 at the SeaTac DoubleTree Hilton which is the same as in previous years. I spent the 7th and 8th "hitting the rooms". Let's go!

Tuesday, 18 June 2024

MEASUREMENTS: Nordost-like flat silver-plated copper speaker cables. And, comments of a "high-end" cable insider compared with an apologist?

Cables are fun to play with! They look different, there are all kinds of brands available, and for some audiophiles, there's a sense that the sound has been "changed" if not "improved" when trying products at different price points. All without lugging big and heavy speakers or amplifiers around which makes the upgrade easy especially if one believes that the change can be equivalent to such component swaps! Speaker cables in particular would be the most interesting because they carry complex musical signals of potentially high current and voltage for longer lengths. (Digital and power cables are least interesting for me for obvious reasons - here's my summary post of cable measurements over the years.)

I've already talked about a number of different speaker cables in the past; most recently here, here, and here. Notice that morphologically, all of them have been "roundish" cables so I thought it would be fun to try something flat and measure to demonstrate the LCR changes that this kind of design provides.

Looking around AliExpress, I found the cables above - China-made Nordost-like speaker cables - I bought the 2.5m pair with locking gold-plated banana plugs for less than US$100. There are similar products found on Amazon but you'll need to shop around for a good price.

I think the design of these are probably most similar to the Nordost Heimdall 2 cables which currently retail for about US$2,500, 2m pair.

Saturday, 20 April 2024

As We Hear It: Audiophile cable truths, claims, and reviewer age. Multichannel "madness"?

Hey everyone, this week let's have a look at a recent E-mail I received and think about the "classic" audiophile topic of contention over the decades - cables!

It has been awhile since I've talked about cables (I've published a number of cable measurements over the years, links collected here). It's not much fun talking about cables these days because after awhile I think most of us have tried enough cables and honestly just realized the truth that it really doesn't matter what the salespeople claim. There are better things to do like just sitting back and enjoying the music than obsessing over what essentially are minutiae with less potential effects* than hi-res audio recordings (which itself is usually questionable).

[* Unless of course the cable intentionally acts as a filter like some of the MIT cables - as per their patent.]

Here's an E-mail I received from reader JW Haus in March in response to a magazine article in Stereophile:

Saturday, 25 March 2023

RETRO-AUTOPSY: Museatex Melior BS-1 Bitstream S/PDIF DAC (circa 1995?). A few words about external clocks for audiophiles. And a speaker cable blind test?

The company Museatex was formed around 1990 by Ed Meitner and John Wright based in Calgary, Alberta, Canada. Over the years, the brand was assumed under A/D/S which eventually closed in 2001. There's still a web page for information on Museatex products here. Ed Meitner has moved on these days to EMM Labs since 1998 and given his work with SACD, his name has been associated with "bitstream" type technologies since (some more info/video).

By the end of the 1980's, 1-bit Philips "Bitstream" PDM DAC chips started to show up in the market with the Philips SAA 7321 chip as one of the 1st generation devices (see Stereophile reporting back in 1989). Some of these chips were incorporated in CD players like the Meridian 208 that came out in early 1990, well-reviewed by Paul Miller in High Fidelity.

By 1991, the "second generation" Philips SAA 7350 "bitstream" DAC became available, capable of taking up to 20-bit PCM (from 16-53kHz sample rate) and upsampling to 1-bit SDM applying 3rd order noise shaping (some more history here). It is this DAC chip that's at the heart of the Museatex Melior Bitstream DAC, I believe first released in 1992. Here are the specs from the company.

The exact history of this particular unit I had access to has been shrouded in the sands of time, but was probably purchased around 1995. The original suggested price on one of these was US$899 which would be about equivalent to over US$1500 in 2023. Even to this day, I've seen comments from audiophiles who have a special affinity to the sound of this vintage DAC. Claims to fame included anti-jitter input circuitry (supposedly reducing "glare and harshness"), a custom digital filter allowing for "more accurate signal conversion", and high quality power supply with line noise filtering.

Thanks again to my friend linnrd for digging this unit out from his audio device archives. While externally it looks to be in very good shape, unfortunately, it didn't quite power up normally for me which sadly resulted in this article being more of an "autopsy" rather than actual measurements. I guess having a look inside is still better than nothing for historical documentation if nothing else.

Saturday, 21 January 2023

MEASUREMENTS: Knockoff "Kimber Kable" 12TC Speaker Cables. And do cable risers / lifters / elevators make a difference?

 

As I'm sure we're all aware, in the world of luxury goods, there will be fakes out there. Wandering the streets of basically any city these days, we'll run into all kinds of cheap "Gucci" and "Hermès" bags, fake "Rolex" and "Omega" watches, knock-off "Nike" sneakers, and counterfeit "Ray-Ban" sunglasses.

So too in the world of the audiophile. It's not hard these days to browse through "used" eBay listings or explore the copious products on Alibaba/AliExpress to find fake "High End Audio" products.

As you probably know, I'm not one to be impressed by most cable claims and believe that there's little value in a lot of what's being sold (collected articles here). Given the high prices for lengths of wire, is it any wonder then that some might want to capitalize on brand names to entice buyers?

A friend who knows I'm into audio stuff, "for fun", decided to get me the cables in the picture above from Singapore recently while on a business trip. The cables are more than likely made in China. As you can see, these are labeled as "Kimber Kable", with the same geometry and supposed build of 12TC speaker cables. He purchased them for <US$75 as a pair of 2.5m lengths.

[Back in 2015, I examined and had a listen to genuine Kimber 8TC.]

Saturday, 26 June 2021

MEASUREMENTS: 1MORE Triple Driver Over-Ear Headphones (H1707) with wired remote & microphone. And on Galen Gareis / Iconoclast Cables interview recently.

Alright folks, on the test bench this week is the 1MORE Triple Driver Over-Ear Headphones (let's just shorten name to 3DOE). If you've seen this headphone over the years (released around Christmas time 2018), you'll probably know that we need to clarify a couple of things.

First, they're not actually "over-ear" as in truly "circumaural" headphones. The earpads/cups are not big and unless you really have small pinnae, will sit "partially circumaural" with portions against the pinnae like supraaural designs.

Secondly, it's more of a "dual" driver design rather than "triple". There are 2 active drivers - a graphene-coated 36mm mylar dynamic driver, and a 10mm ceramic/piezoelectric driver for treble. The third "driver" is the passive "bass reflector", much like speaker passive radiators but inside a closed headphone reinforcing a certain amount of bass response.

The silver model like the one I have here is the graphene-coated version. There is also a gold-colored version out there which is a titanium driver without the graphene layer. I've seen comments that the sound is similar between the two versions. This one was bought through the regular Amazon retail channel (on sale for <US$150) and as far as I can tell, is the current model with an inline remote control plus microphone good for use with your smartphone.

Saturday, 23 January 2021

Cable review: Monoprice Stage Right Series XLR - gold plated connectors, 16AWG conductors and differences between Made in China & Made In Vietnam... A few words about cable demos.

 

Behold... An XLR cable. How exciting. :-)

Although I've discussed speaker cables more recently, it has been ages since I've talked about interconnects. Nothing unusual about that - there's really not much to talk about - they're lengths of wire for low-voltage analogue audio signals! (The exception being AES/EBU digital over XLR cables.)

These days, cables are way past being "mature" products for analogue/digital pure-audio purposes. Of course this doesn't stop companies from trying to differentiate themselves and claiming to have achieved new levels of performance or supposed "significant" improvements in this or that and thus achieving "superior" audio quality.

What I think about "audiophile" cables is no mystery I hope - here's the summary post with various measurements compiled over the years that should cover most questions most might have.

For today's post, let's dive in and talk with some detail about XLR cables and these Monoprice Stage Right Series XLR cables (~US$20/6' length) which have become a standard for me here in the home recently whether for my sound system or for testing. To be clear, this is not a sponsored post and Monoprice did not send me the cables for free. I'll let you know if any product comes through this blog that is not directly purchased or borrowed from friends.

Saturday, 11 April 2020

MEASUREMENTS: NB Cables "The Vigilante", Raymond Cables, Canare 4S11, Slinkylinks Silver Speaker Cables. (And related thoughts on audiophile "snake oil".)


Continuing on from the investigations into LCR parameters for speaker cables started a few weeks ago, today, let's have a look at a few more cables with the REED Instruments R5001 (remember there are limitations of course but comparisons can still be made across cables). As you can see in the previous article, the cables I measured were zip-cord types compared to my DIY "Colorful Speaker Cable". Today, let's look at commercial speaker cable offerings and check out some numbers for each.

Among the cables in the montage above, notice that I do have a more "exotic" cable, the silver conductor, Slinkylinks Biwire with gold banana plugs (asking price back in the early 2010 for 4m/13' was NZ$1840 = ~US$1100 today). As with last time, let's go through the measurements one by one, ending off with those Slinklinks.

Saturday, 22 February 2020

MEASUREMENTS: Archimago's Colorful Speaker Cables, KnuKonceptz, AmazonBasics, and "freebie" speaker cable. (And changes at Audiophile Style.)


As hinted at with the article a couple weeks back of my simple DIY speaker cables, let's spend some time considering the basic speaker cable measurements, how these affect the hi-fi system, and get a sense of the magnitude of effects to be aware of.

If you read the audiophile publications, it's not uncommon to see articles paying lip service to the importance of science in cables and measurements, yet at its core, they're often written to perpetuate fears, uncertainties, and doubts (FUD). IMO, this recent Positive Feedback article is a good example in that it acknowledges resistance, inductance, and capacitance but goes out of its way to describe complexities without actually giving you any contextual information about the values of these quantities. Notice the title. The "snake oilish" nature of something isn't nullified just because acknowledgement of the term is used. And certainly, denial is to be expected from supporters of "snake oil".

Saturday, 8 February 2020

DIY: Archimago's Colorful Set of Speaker Cables. (And about that Darko/McGowan "EXPERT" interview on USB cables & other claims.)


While it's probably perilous to guess which cables "make the most difference" (just look at the different opinions here), arguably, other than very-low-voltage phono cables that can pick up interference easily, I'm guessing that speaker cables probably can make the most difference in a sound system on account of longer lengths and the fact that speakers are low impedance devices. As a result, the additional resistance, inductance, and capacitance of speaker cables may be relevant to performance.

Furthermore, in extreme cases one could run into systemic instabilities, for example years ago the Polk Cobra cable was called an "amp killer" on account of high capacitance and very low inductance. This Nelson Pass article from back in 1980 listed that cable as having 500pF/ft capacitance and discussed the need for a damping network to avoid high-frequency oscillation with high bandwidth amplifiers. Clearly sometimes the amplifier might "see" the difference a cable introduces even if anomalies are inaudible.

Saturday, 28 January 2017

QUICKIE POST: Yes, cables matter... (for HDMI 2.0/4K/60fps/HDR...)


Well, of course cables matter! Without them there would be no sound or image! The key of course is to be wise enough to have a concept of what is needed, and how much difference the cables/wires can make.

Just a reminder, if you have not seen it yet, here is my summary of tests and thoughts on audio cables over the years if you're wondering about that.

As for today, given that time is limited this week, I just wanted to put up a "quickie" post mainly about some 4K HDMI cables I tried over the last couple months in setting up my 4K TV (a Vizio P75-C1).

Wednesday, 2 November 2016

MEASUREMENTS: Crystal Cable CrystalConnect Micro 1m Interconnects... Differences vs. Generics???

Alright guys... As you know I've measured cables in the past - why audiophile magazines never seem to get around to this is anyone's guess :-). And as I summarized here, there really hasn't been evidence of a meaningful difference between various cables of all sorts.

Over the years, I have tried to measure cables which are considered "audiophile quality" when I can get my hands on them. You know, things like the Synergistic "Tesla" power cables, or these Kimber 8TC speaker cables. Note that obviously if I really wanted to, it's not like there aren't a selection of audiophile stores locally in Vancouver. Without evidence in my own subjective experience or reasonable theory that major differences are even possible, I'm obviously not going to go out of my way to test these things when there are so many other topics to learn about and explore! When I had the opportunity from a friend to hang on to these cables for awhile and test them out, well, why not? Especially since he's had these for years and they're well "broken in"! :-)

Behold, the Crystal Cable Micro; we're often reminded in reviews that Crystal Cable is based in The Netherlands (parent company International Audio Holdings which also owns Siltech):
Notice the small round "silver billets", all part of the typical Crystal Cable esthetic. New models have a more ovoid shape.

Saturday, 5 March 2016

MUSINGS: Cable Claims, Testimony ("Buyer's Guide") & Sponsored Content...

Cute CD BTW for the Simpsons lovers out there...
I must admit that I rarely pay attention to the folks at Hi-Fi+. Other than occasionally skim over an issue at the magazine stand, I find it generally lacking in details and looks too much like one big glossy advertisement.

Shortly after writing the previous article on Chromecast Audio including jitter discussions, I noticed on Dr. AIX's recent post that he linked to a 2015 "Hi-Fi+ Guide To Cables" PDF and decided to wander over for a peek (I know... Bad move, right?). I'm not going to enumerate all the disturbing comments and beliefs advocated but I would like to point the reader at the modestly interesting interviews with the various founders and representatives of the cable companies. Particularly, there was one question asked of each manufacturer - whether they would comment on the best type of digital connection to use: USB, I2S, Ethernet, or coaxial S/PDIF (why not include TosLink S/PDIF?).

Sunday, 21 June 2015

MUSINGS: Audio Cables Summary, Non-Utilitarian Functions & Scientific Falsifiability


At this point, I believe I have examined all the audio cable claims I need to for awhile (along with some related items):

Analogue:

RCA interconnects
Crystal Cable CrystalConnect Micro 1m RCA (added Nov. 2016)
Speaker cables (Canare 4S11, Kimber 8TC, zip-cord, bi-wiring)
Speaker cables (LCR measurements and various zip-cords) (Feb. 2020)
Speaker cables (NB Cables "The Vigilante", Raymond Cables, Canare 4S11, Slinkylinks) (Apr. 2020)
Knockoff "Kimber Kable" 12TC speaker cables (and cable lifters) (Jan. 2023)

Fun related discussions:

Sunday, 14 June 2015

MEASUREMENTS: Speaker Cables / Wires (Canare, Kimber, and the "Frankenstein" Zip Cord)


Awhile back - in October 2014 to be exact, I spoke a bit about speaker cables, posted some electrical data, and made myself a pair of 4' Canare 4S11 bi-wireable lengths with locking banana plugs to use at home. These are the black cables you see above to the right. I've been happy with them since and as I noted in that previous post, I heard no discernible difference compared to standard 12G copper zip cord nor did I feel bi-wiring made a difference so I reinserted the speaker jumpers to effectively make this a single 11G cable (no risk losing the jumpers!).

However, I presented no measurements at that time. As I mentioned last week, since I've been doing some room measurements lately (which I will talk more about in a future post), I figured it was time to put my impressions to the test and see if I can detect a difference objectively with speaker wires. Today, I present a few measurements in 2 parts - Part I is with a very "poor" zip cord (the above image, left cable), and Part II with a well known and "audiophile approved" commercial cable.

Friday, 3 October 2014

DIY / MUSINGS: Bi-Wired Canare 4S11 And Speaker Cable Discussion...

A couple weeks back I was tempted to make some of my own speaker cables out of bulk Canare 4S11 cables I had at my disposal. Note that with my Emotiva XPA-1L monoblock amplifiers situated close to the speakers themselves, I only needed 4' lengths of speaker cable. As such, it'd be ridiculous to claim that whatever speaker cable I use, there would be "huge" audible differences. I was more interested in upgrading the banana plugs to the 'locking' variant for a better connection and since I'm already constructing the cable, I might as well make a bi-wired set to have a listen and also because it's "cool" :-).

Without any live model willing to don my home made cables, I managed to find a reasonable substitute:

Apologies to this guy, and various ads like this over the years... I could get some heat shrink tubing to improve the cosmetics especially of the amplifier end, I suppose.
Okay then... So basically I have some "star quad" speaker cables now. Theoretically at least, the "star quad" cable configuration will reduce close electromagnetically-induced interference and this can be beneficial especially for low level signals - typically balanced microphone cables (here's Canare's "Star Quad Story"). This is not an issue with speaker cables carrying high level signals.

Canare and other manufacturers of these star quad speaker cables will also espouse the benefits of reduced radiation from the speaker cables (see this Canare PDF). I guess if one is running a pro set-up with very high power amplifiers, long lengths of speaker cable with low-level poorly shielded microphone wires nearby this could be an issue. As for the home set-up - highly unlikely of any benefit unless you do stuff like have long lengths of low level turntable phono cables lying around - obviously not "best practice"!

I found the Canare cable easy to work with, is quite flexible, appears to be constructed well ("Made In Japan") and this little DIY project took maybe 2-3 hours to put together and test. Most of the time was spent making sure I got the lengths correct. The Emotiva XPA-1 has quite a wide physical spread between binding posts - almost 1' apart. At about $1.50/ft, the cable is cheap and quite easily available at many cable suppliers on-line. The 4S11 cable consists of 4 conductors ("quad") under the sheath. Each multi-stranded conductor is 14AWG and a pair would be equivalent to 11AWG; as you can see, this makes it really easy to create a "bi-wire" configuration.

It has been many years since I've seen articles measuring speaker cables (many back in the early 2000's; perhaps controversies have settled somewhat?). Yes, speaker cables can be measured with sensitive equipment and generally, the idea is to keep the gauge/thickness adequate for the length in order to keep resistance low. Kudos to Audioholics for producing excellent no-nonsense articles on cables over the years. They have a nice article on this topic. Despite claims usually by manufacturers, good 12AWG copper zip cord speaker cables are essentially all one ever needs unless you're using >50 feet lengths (and 50 feet is being really conservative). Other parameters like the capacitance and inductance of the cable may affect the sound but we're only interested in audible frequencies up to 20kHz and with typically short runs of cable, these electrical parameters are unlikely to change sonic quality. It has been said that high feedback transistor and push-pull tube designs can oscillate at high frequencies (especially out-of-audio-band oscillations which may not be heard but can burn out tweeters and amplifiers) with high capacitance cables. I've heard legends of Phase Linear designs oscillating with the old Polk Cobra cables (low inductance, high capacitance Litz wire) from the 1970's for example. I suspect this only happens with 'exotic' cables and amplifiers of questionable design (otherwise we'd be hearing about smoking speakers and amps happening frequently)! Some manufacturers have dragged up phenomena like skin effect, but we're talking audio frequencies, not HF here and calculations have not suggested any significant issues.

There is clearly potential for sonic improvement with bi-amping especially with separate crossovers for speakers like with this article by Mitchco. But bi-wiring? I don't see how this improves anything other than potentially lowering resistance (thicker total wire gauge and double the connections to the speakers), or bypassing very poor speaker jumper plates. If anyone has seen analysis to suggest that electrically bi-wiring makes a difference, please comment!

One of my favourite cable review articles is for the classic Kimber Kable 8TC. Now this is the kind of review I wish I saw from the typical audiophile press. For comparison, here are some vital stats between the Canare 4S11, Kimber 8TC, Belden, and cheap zip cord looking at results where available between 20-20kHz (results from Audioholics or from manufacturer where measurements unavailable):

Canare 4S11 (11AWG - 2/4 conductors): (~$1.50/ft, I noticed some Ram Electronics 4S11 cable measurements here)
     DC Resistance: 2.6 mohm/ft
     Capacitance: 45 pF/ft
     Inductance: <0.12 uH/ft

Kimber 8TC (10AWG): (~$6.00/ft)
     DC Resistance: 2.19 mohm/ft
     Capacitance: 100 pF/ft
     Inductance: 0.037 uH/ft

Belden 10AWG: (~$0.75/ft bulk, as used in Blue Jeans cable's 5T00UP)
     DC Resistance: <2 mohm/ft
     Capacitance: 25 pF/ft
     Inductance: ~0.16 uH/ft

Zip cord (12AWG): ("Sound King" measured here, ~$0.50/ft)
     DC Resistance: <3.31 mohm/ft
     Capacitance: ~15 pF/ft
     Inductance: ~0.2 uH/ft

These are microscopic variations between very reasonable cables, would it be surprising if short runs of <50 feet or so results in no discernible difference?

Have a look at Audioholics' "Speaker Cable Faceoff 2" article for measurements of more expensive stuff... Here's one:

Cardas SE 9 (9.5AWG): (~$13/ft or so)
     DC Resistance: <3.38 mohm/ft
     Capacitance: <285 pF/ft!
     Inductance: <0.05 uH/ft

It's interesting how high the capacitance result is with the Cardas though, presumably by design. For the purpose of "high fidelity", I think most of us would agree that "the best cable is no cable". If this is true, then in principle shouldn't we be going for the lowest amount of these parameters? (Unless of course one is aiming for frequency coloration - the proverbial "tone control".)

Speaking of capacitance, let's go a little further, using my set-up as an example. One could do it by hand, but here's a quick calculator: Electro-Voice Cable Calculator. Plugging in the number for the Emotiva XPA-1L (250W, 8 ohm, 500 dampening factor), into the Paradigm Signature S8 speaker (8 ohms), with the 4S11 cable (let us be conservative and say 11AWG for 2 strands, 4 feet, 50 pF/ft), the roll-off frequency (-3dB) due to capacitance is at 99MHz; that is to say, capacitance just isn't going to be an audible issue. Play with the calculator using numbers from your own set-up. The fact is that with typical speaker cables, capacitance roll-off in the audible spectrum is not an issue until you're in the 1uF range (1,000,000 pF)! Of course, by the time you run say 2000 feet of cable to reach that level of capacitance, you'd be experiencing >5dB power loss (~60% less watts reaching your speakers), demonstrating that resistance as related to conductor gauge and length is much more important than capacitance in affecting signal integrity assuming the amplifier can handle such an extreme situation.

For those interested in the physics/calculations around inductance, have a look at this post with John Murphy's calculations to demonstrate how unlikely this is an issue as well.

---------------------------

Since it's impossible to do 'instantaneous' A/B testing with speaker cables accurately due to the time it takes to switch out the connections (unless I had a special switch box), I listened to my set-up with the Canare 4S11 bi-wired to one speaker, and my old 12G zip cord to the other to see if I can hear channel imbalance, tonal change, differences in level of details revealed. I tried and even got my wife and kids involved - no discernable anomaly. Mono music still sounds nicely centered and tonally balanced. Stereo soundstage is maintained; as an example, I love the old Ella Fitzgerald Pure Ella: Ella Sings Gershwin album that I got years ago. Ella still sounds like she's singing right in front of me in a private performance. Fancy stereo effects like QSound stereo widening and "surround" image still produced the 360-degree effect suggesting no significant untoward change in phase relationships between the speakers connected with different cables (remember, I'm only using 4'!).

Ultimately, it's fun doing these little projects... Especially at little cost. Although I felt that there was no audible benefit in this case (hey, I wish I did!), like I said, it was more so I could upgrade my banana plug connectors to the locking variety and having a set of bi-wired cables to demonstrate to friends if they ask and want to listen for themselves. You can easily find pre-built 4S11 cables on eBay or off Amazon from Ram Electronics. Of course, with only a little elbow grease and some time, I put this together with bi-wired speaker connectors for 1/2 the price. [2018 Addendum: I recently noted that Blue Jeans Cables is now selling 6' non-bi-wired and bi-wired speaker cables based on the Canare 4S11 at good prices with welded connections... Nice.]

(For more interesting reading: speaker wires and history from Roger Russell.)

Addendum: After about a week, I decided to reinsert the Paradigm Signature S8 (brass?) speaker jumper plates. The rationale is that I feel bi-wiring makes no difference and I didn't want to misplace the jumpers; so might as well leave them in place where they should be. This essentially makes the cables a set of 11AWG wires in star quad configuration with better cable-to-speaker contact since there are now two connectors. Electrons are smart little guys and can decide for themselves if they want to pass through that jumper plate :-).


Addendum 2: Train's new album Bulletproof Picasso just came out. I was having a listen to it and was impressed by how good the dynamics sounded. So I ripped the CD and discovered that it has a DR11 score - shocking for a modern pop album! Considering their previous efforts California 37 (2012) had a result of DR6 and Save Me, San Francisco (2009) of DR5, this was a very pleasant surprise... Could it be? Could it be that record producers are recognizing it's about time to terminate the loudness war? Could it be that they finally realize that distorted audio is bad for the music industry? Here's hoping the tide is indeed turning.

Saturday, 1 February 2014

MEASUREMENTS: Power Cable Redux. The Synergistic Research Tesla T2 SE, T3 SE and PowerCell 4.

As promised over the last months, I've been wanting to borrow some expensive cables to measure to see for myself if I can both objectively and subjectively experience a difference. I've measured power cables before with my ASUS Essence One DAC's output but it just so happened that recently a friend decided to "go deep" into the world of audiophilia and purchased a little "family" of Synergistic power cables to try out:

What we're looking at here is a "tree" of Synergistic gear :-). Plugged into the wall is a "Tesla T3 SE" cable connected to a "PowerCell 4" (basically functions as a 4-outlet power bar). Coming out of the PowerCell on top are 2 "Tesla T2 SE" cables and an Audience power cable (not evaluated here). The blue lights come from the "Enigma Bullets" which I'll address a little later. My friend has been listening with them for >6 months so there's no issue with new cable "break-in".

As has been expressed by others, it's hard to make a case for power cords... The AC in our homes are connected through tens/hundreds of miles of cabling of various gauge. Within one's abode, it's interconnected with multiple outlets (unless of course you hire an electrician for a dedicated line) usually through 14AWG copper wires for most 15A circuit breakers here in Canada. Could the last few feet be significant?! Does running fancy cables like those above really improve sound quality? Here's a chance to have a look and listen...

I. A Look at the Synergistic Tesla T2 SE (5'), T3 SE (5'), and PowerCell 4

For the purpose of these measurements, I wanted to keep it convenient for my friend - the way it's configured as already attached to the Oppo player:
Oppo BDP-105 <-- Tesla T2 SE <-- PowerCell 4 <-- Tesla T3 SE <-- Wall outlet

I'll spend some time talking about the T2 SE since it's the cable directly connected to the Oppo. You can have a look at the manufacturer's information at their website if unfamiliar with this cable. Although not the "top of the line" AC cord, this unit has most of the "headline features" which supposedly provides benefits. It's got some kind of silver & copper conductor construction, "Tricon" and "T2" (?) geometry, high quality "G 07" IEC plugs... Then there's the "Quantum Tunneling" - some kind of 2 megaV pulsatile "treatment" that transforms "the entire cable at a molecular level" (what molecule(s) they did not say...). Check out some more pictures here.

Finally, we have the well advertised "Active Shielding". The claim here seems to be that using an electrically active (DC current) shield improves noise level and some how "greater frequency extension from top to bottom." We are of course not graced with any charts/graphs/details as to how this was determined.

To make things even more "enigmatic", we have these "Enigma Bullets" a.k.a. "Active Shielding Modules" capable of "tuning" the sound! They screw into the pigtails hanging off the male ends of the power cables. Silver = "open and airy", Black = "warm and rich", Grey = kinda in between. Hopefully the pictures below clarify the description:
Despite the huge calibre of the T2 SE cable, it actually feels rather hollow so it's hard to tell what wire gauge is being used inside.

Here they are, the "Bullets":
Cute, solid-feeling metal pieces with an electrical connector on one end and a little LED (the blue light shown in the 1st picture) on the other. They get warm plugged in to the DC source so I whipped out the multimeter and got 1400-ohms resistance for the black one, and curiously 1200-ohms for BOTH the silver and gray ones - not sure if this is supposed to be the case.

The "DC power" end of the "Active Shielding" is connected to what basically is a wallwart ("Mini Power Coupler") - here's a picture of them (2 for T2 SE, 1 for T3 SE) connected to the power bar:
Notice the $399 MSRP Synergistic "Quantum Line Strip" QLS-6 - power bar, no surge suppression - also "Quantum Tunneled"!

Of interest, you'll notice that one of the wallwarts had a sticker that fell off over time! Here's a close up of the label underneath:
A basic wall plug AC adaptor, 24V 300mA switching power supply you can order bulk from ENG Electric in China or Taiwan. Unless I'm mistaken, asking price for one of these is $125 (here)!

Here's the manufacturer's page on the PowerCell 4. It functions as a 4-outlet power bar. I don't think there's any surge suppression on it. It felt surprisingly light weight to me. I have no idea what they mean by a "magnetic cell" or what benefit that affords (?are there magnets in there?). Also, the comment about "The PowerCell 4 also improves picture quality on any display, with darker black levels, better color saturation and a more 3 dimensional picture, simply amazing" should be objectively assessable.

Finally, between the wall outlet and PowerCell 4 is the hefty Tesla T3 SE power cable. Again, here's the manufacturer information page. Looks to me that the main difference is the higher number of conductors (ie. thicker overall effective wire gauge) compared to the T2 SE above. You can read more about this PowerCell & T3 SE combination in this subjective review.
T3 SE cable plugged into wall. Notice its own lit "Enigma Bullet" and you can see the "Active Shielding" winding wrapped around the main power cable.
I could not find a price list all in one place... But the MSRP is something like this as of January 2014:
- Tesla T2 SE cable - $650/5ft (here)
- PowerCell 4 (North American) - $1,250 (here)
- Tesla T3 SE cable - $900/5ft (here)
----- Total MSRP for the set = $2800 USD

 

II. The Test

My friend lives in a multilevel condo and I figured that if indeed an expensive AC cable system is capable of cleaning up the noise coming through the outlet, then this is the kind of environment to demonstrate an advantage!

Of course, the comparison must be to a generic IEC cable, but lets make the generic AC cord even more disadvantaged - I'm going to add a 12' length of inexpensive extension cord to it. Measurements will be taken off the RCA output from an Oppo BDP-105 which he uses (the Oppo is an excellent USB DAC based on previous tests a year ago). This also gives me an opportunity to show a few measurements beyond my usual ASUS Essence One / Transporter / TEAC UD-501 trio of DACs.

Here then are your test "subjects":

A. Synergistic Research Tesla T2 SE to PowerCell 4 to Tesla T3 SE plugged into the condo wall plug:

B. Generic 6' 18AWG IEC AC cable I got 'free' in the box with something (black) + Generic 12' extension cable (white) into condo wall plug:


Test Setup:
Win 8.1 i5 Ultrabook --> shielded USB --> Oppo BDP-105 (powered with either A or B above into outlet) --> shielded (Tributaries) RCA --> EMU 0404USB --> shielded USB --> Win8 AMD X4 measurement laptop

- Newest Oppo USB driver (1.61)
- Latest RightMark Audio Analyzer (6.3.0)

 

III. Results

As usual, I'll measure at 16/44 to make sure the results cover standard CD-quality output. Then I measured 24/96 to get an idea of "high-res" performance. The tests were run under 3 conditions: Synergistic system without Active Shielding (wallwarts unplugged), Synergistic system with Active Shielding using Gray "Bullets", and finally the generic IEC cable + extender. (Note that in the labels I used "T2SE" but in fact the whole Synergistic chain was measured including PowerCell 4 and T3SE.)

16/44 (standard CD resolution):

Frequency Response
Noise Level
IMD + N
24/96 (high-resolution):
Frequency Response
Noise Level
IMD + N
As you can see... The expensive Synergistic power cords + PowerCell made absolutely no difference to the Oppo's analogue output compared to an absolutely generic power cable attached to extension cable for both standard resolution 16/44 and hi-res 24/96 test signals. Inter-test results were essentially exactly the same in all 3 conditions. No evidence here that the Active Shielding made any difference either.

For those who might wonder about jitter...

Again, no different. (Of course one cannot expect a power cable to affect jitter nor J-Test to be too anomalous through an asynchronous USB DAC.)

IV. Conclusion

Within the limits of the testing equipment - the EMU USB0404 as ADC - there is no difference using the Synergistic power cords with the Oppo BDP-105 compared to a generic 18AWG IEC power cable with extension cable in a multilevel condo building near the heart of the city.

Although the USB0404 isn't to be used professionally as test gear, as previously shown, it is a capable "measurement" device able to demonstrate very tiny effects like the -90.3dB LSB test, effect of digital filters, and slight differences between similar SPDIF digital transports; all of which I believe would be below the threshold of hearing for the vast majority of people. As such, I do believe the results above to be accurate and reflect reality when it indicates there is zero difference.

Could these fancy cables improve the sound from other devices like power amps or older technology like tube gear? I don't know... Remember though that tube equipment have much higher noise floor in general so even if this cable could lower it, the difference would likely be irrelevant. As usual, if power cables could substantially improve sound quality, why has there not been good evidence after all these years? I've often wondered why cables like these are not subjected to objective measurements like speakers, DACs, pre-amps, etc. in magazines like Stereophile using their fancy measurement devices? (Heck, many of these cables cost substantially more than good components!) Furthermore, right on Synergistic's web page, we are told that the "Active Shielding" lowers conventional parameters like noise floor and frequency response ("this closed circuit design not only improved subjective performance, but also made our cables measureably (sic) quieter, thus improving detail with greater frequency extension from top to bottom..."). So where are those measurements, and under what conditions? Peripherally, gimmicky marketing terms like "Quantum Tunneling" as it refers to the process they use really should be better explained (seriously, any time a company starts referring to Quantum-anything in the macroscopic world, it's best to be cautious). Finally, if sonic improvements can be made with a cable, did Oppo not bundle one they've tested to be optimal despite all their other engineering efforts?

Subjectively, I have heard my friend's system with the Synergistic cabling and with the generic power cable (as well as other systems with fancy cables but not to this degree of testing). To be honest, there's really not much to say subjectively with any certainty doing a tedious A/B/A trial. Do I think the Synergistics make the sound better? I'll go with the objective results and say this is most unlikely... Without a special setup, it's essentially impossible to do an accurate A/B comparison since there would be too much delay between cable switches, Oppo boot up, then start playing a song to really make any reliable comparison based on auditory memory of mental markers for high-fidelity. If audio qualitative differences were big enough, of course this could be a trivial task, but for at best tiny differences as in this case (if any), I do not believe this is possible based on research into the limitations of echoic memory. Good to see the measurements at least did not show any worsening using the exotic cables. All I can factually say is that the Oppo BDP-105 sounds great (and measurements demonstrate this high fidelity) through his system irrespective of which power cable(s)!

When it comes to power cables in my home system, my internal wiring is standard 14AWG copper and that's the "best" it's ever going to get in terms of power distribution. I don't see how passive wires can do anything for noise floor or "control resonance" or such beliefs. I'm quite happy with generic shielded 18AWG IEC cables for low power devices like the DAC, pre-amp, DSP equalizer. For higher power devices like the monoblock Emotiva XPA-1L and Onkyo AV receiver I have 16AWG shielded generic cables. I do not believe I hear a difference between the 18 and 16 gauge cables with the amps (in fact at one point I had an 18AWG cable on one monoblock and 16AWG the other and notice no stereo imbalance, noise, etc... even at high volumes) but I guess at least it makes me feel good that I did a little more to feed the neurosis :-).

As usual, please feel free to drop a link if you come across other tests on cables such as these; especially tests which have shown significant differences.

Recommendations:

- I've been listening to Eric Bibb's Blues, Ballads & Work Songs (2011) recently and I'm enjoying this Opus 3 SACD (was listening to the PCM layer on my friend's system the night of the Synergistic testing in fact). Easily accessible and great resolution!

- Mark Waldrep (aka "Dr. AIX") runs a nice blog at Real HD-Audio. Opinions and insights from a respected figure in the high-fidelity/audiophile world who clearly "keeps it real". If you haven't, I would highly recommend having a listen to some of AIX's recordings; especially in multichannel and the samplers provide a taste of his work. He posted an amusing recent anecdote on the use of a standard 75-ohm cable for digital audio at CES 2014. Also calling out the snakeoil on these "treatment" products sold through Blue Coast Records  - I wonder if they work better in PCM vs. DSD :-) (Dr. AIX's blog post). Respect.

Enjoy the music... And keep it real, folks :-).

PS: A big thanks to my friend for offering and helping with the testing - he has of course reviewed this write up for accuracy.


Saturday, 9 November 2013

GUEST REVIEW & MEASUREMENTS: The Quantum HDMI Squeezer + ULTRA Cable: A look at HDMI cables.


By Keaton I. Goulden-Eyre III, Esq.

With Archimago overseas, he implored that I take a few moments to contribute to this most obscene of blogs (sorry dear readers, "objective" and audio do not mix in my worldview based on experience, wisdom, and my ears). Recall that many months ago, I brought you the review of Dr. Frank's "Best-Coaxial-Digital" SPDIF cable. I remain steadfast in my opinion of that fantastic interconnect!

A reminder - the introductory price is still available until December 31st! At $4999.99, it is a steal.

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The cellular phone rang - "How inconvenient!"

That was my initial thought the evening I heard about the cable being reviewed today. It happened in August as I was at my usual Las Vegas soirée with associates enjoying some Château Pétrus on my way to a Wolfgang Puck restaurant with a tender morsel of imported Wagyu in mind.

On the other end was Alfred Fitzgerald, LL.B. A member of my exclusive gentleman's club back home who could not wait to discuss an amazing audiophile find. Having had many deep conversations around our shared passion for audio reproduction, he knew that I would find his news intoxicating. He was correct.

It so happened that recently he was representing the interests of a client; Dr. Joseppi Maltzarelli, in the acquisition of a 30m yacht off the Florida Keys. He discovered that Dr. Maltzarelli was in fact a physicist who interned at CERN's Large Hadron Collider in 2005. His ground breaking theories on the vibrational qualities of quantum superstrings in the terahertz range drew applause but also envy from colleagues such that he decided to leave the "mainstream" physics community to become the chief scientific officer of a startup to leverage his theories and experience. The company: QuantaVibes Inc. based in Dushanbe, Tajikistan, aptly located just across the street from the Gurminj Musical Instrument Museum showcasing the history of stringed instruments.

Although the phone conversation was brief, I could not enjoy the succulent Kobe that night - lost in thought as I contemplated the potential of what I heard! I just had to call Dr. Maltzarelli upon my return home. I was almost unable to enjoy Céline Dion that evening!

After many E-mails and calls to QuantaVibes, I was finally able to track down Dr. Maltzarelli via satellite phone located somewhere off the coast of French Guyana in his yacht. It was a wonderful discussion; here is a good portion of our conversation:

ME: Good afternoon Dr. Maltzarelli. Thank you for taking my call.

JM: Absolutely Keaton, any friend of Mr. Fitzgerald's is a friend of mine. (Both laugh in approval.)

ME: I am curious my good fellow, whatever are you doing out at sea?

JM: The South Atlantic is beautiful this time of the year, my friend! I'm planning to sail down to Brazil and into Uruguay by the spring time where I will go inland to research the acoustic resonances of spiritual earthenware of the Amazonian peoples. Just a well deserved vacation after years of programming my supercomputer to calculate some Super Large Numbers involved in Superstring equations. The company is almost ready to ramp up production on what we believe will be the most significant HDMI audio upgrade in this generation - if not the most significant audio upgrade of all time!

ME: Amazing Joseppi. I'm perplexed however, how did a physicist of your calibre ever get involved in audio in the first place?

JM: You see, this is what happened. In 2005 when I was at CERN, I discovered that free-electron lasers were capable of inducing terahertz vibrations in the Superstring subequations as expressed using the derivative of the semiconductor Bloch equations. This caused quite a stir in the community because it meant that resonance effects created by this perturbation in high order space-time could fold down into our 3 spatial and single temporal dimensions! My colleagues were not able to handle this truth. They started a smear campaign decrying my theories and even went as far as to label me as mentally unstable!

ME: Terrible! Such close mindedness - they probably still believe the earth is flat! Was this why you left CERN?

JM: Yes, amico. I could not tolerate this final insult and left to pursue other avenues to realize the profound implications of this research. As to the second part of your question; audio was a natural fit for these equations. Like the strings of a violin, the Superstrings resonate in a natural harmonic. It just so happens that these harmonics precisely overlap with the audio spectrum when free-electron laser spectroscopy is activated at odd harmonic multiples. As a result, we can precisely tame the stray frequencies and decouple the thermionic energy flux passed across various equipment. My research pin pointed to the HDMI interface as one which could use this "taming" effect as a first foray into audio reproduction for the company.

ME: So, is it something to do with the HDMI interface's complexity?

JM: Precisely Keaton. You see, HDMI transports "bits" like how the Transporter in Star Trek transports matter. HDMI communicates using TMDS which sends those bits and nibbles with no respect for timing or integrity. This just shreds the musical information apart and artificially reproduces it at the other end! No wonder people experience horrific digititis, headaches, gout, sarcoidosis, gastrointestinal problems, and other forms of neurasthenia with this wretched interface for music. Is it any wonder how jittery the HDMI interface is?

ME: Impressive, doctor. So what is this product soon to be released to combat the problem?

JM: Soon, we will be releasing the QuantaVibe Quantum HDMI Squeezer and accompanying QuantaVibe ULTRA HDMI Cable. They should be purchased as a pair for synergistic effect. The Squeezer consists of an adapter for regular HDMI to micro-HDMI because supercomputer simulations demonstrated that the smaller size of the micro-HDMI interface precisely corresponded to the wavelength of these Superstring terahertz vibrations. The increased density of electron flow through the micro-HDMI connector accentuates the resonant-transduction effect by 323%. We've treated this device with a patent pending ultramicrochip which precisely aligns the resonances. Unfortunately this is a trade secret so I cannot elaborate any further.

ME: And how about the ULTRA Cable?

JM: We understand if an audiophile wishes to use a standard size HDMI-A connector or cannot modify their system to accept the micro-HDMI. It is more convenient but no matter how I load my equations for the terahertz wavelength, it is still a compromise due to the size of that connector. Nonetheless, we will be selling separately our ULTRA Cable which has some of the technologies incorporated in the microweave of the insulator. Again, I cannot divulge any further information on the technology itself lest I get in trouble with the CEO of the company. (Both laugh.)

ME: You know Joseppi, many insane "objectivists" will be very critical of these worthy products. What do you have to say to potential critics?

JM: Keaton, my friend, there will always be "haters" in this world. I faced many back at CERN under the guise of "peer review" and still get many thumbs down with my Facebook posts and criticism with interviews like this one probably. I do not expect everyone to appreciate the benefits. In our extensive testing in the lab, only those with excellent hearing, trained ears, truly high-end equipment, and impeccable taste in music can fully enjoy what we are about to produce. Furthermore, we are so convinced that the discriminating audiophile will love this product that we will be offering a 35-day guaranteed satisfaction or full refund! Absolutely no risk! I do not believe anyone can beat that.

ME: I have never heard of this kind of offer - 35 days! Now how about sending a set to me for a review?

JM: Absolutely, sir. I will have my people contact yours. I apologize Keaton, I have to go now, the fidanzata is calling... Never let the fidanzata wait...

ME: I absolutely understand. I look forward to the review sample and our next opportunity to converse. Perhaps at an audio show? I hope you find some hidden truths in the spiritual earthenware of the indigenous Amazonians.

With that, and good to his word, a package arrived from Tajikistan two weeks later. Neatly secured in its own black silk pouch I found this set of adapter and HDMI interconnect:

The workmanship was excellent. Black which matches my custom-designed HDMI DAC (connectors personally soldered by Nodko-san in Japan) with fabulously gold plated connectors. Directionality was clearly marked on the cable (not shown). I was informed by an associate at QuantaVibes that these are prototypes and the production units will feature gold embossed lettering on aerospace-grade titanium in place of the white label shown above.

The Quantum Squeezer is a mere 6cm (2.5") in length but tucked within it the full package of Superstring optimizations. At perhaps 15 gm in weight it was ethereally light - befitting of the level of technology! The ULTRA Cable is 12' in length and should be long enough for essentially any connection between your source and the HDMI DAC. This cable was optimized for music so do not expect it to carry nonsense HDMI 1.4 extensions like 3D or even 1080P to some sources*. Wow! Mind boggling how the potency of these optimizations were capable of limiting video transmission in the service of audio.

"Ultimate Smooth"
I immediately connected up the Quantum Squeezer and ULTRA Cable to the HDMI input of my UltraBook computer and custom DAC for a listen. (Remember, the Quantum Squeezer only works with the micro-HDMI port common on newer portable computers like laptops/ultrabooks.)

I don't know how Dr. Maltzarelli did it, but he did! I swear, the Herbert von Karajan & Berliner Philharmoniker Beethoven Symphonies played in my soundroom from my 16-driver 863 pound custom speakers with GIA FL grade diamond tweeters driven by special edition Nodko 8-Watt SET tube amps with a sparkle and clarity I had not thought possible. The strings were smooth like a well aged Highland single malt scotch whiskey or the hum of my newly acquired Jaguar F-Type V8 S. The timbre of each instrument resonated with a "note" beyond the vocabulary of the best Wine Spectator writer. This was the power of Superstring audio optimization!

The beautiful multi-layered vocals from Stephen Layton & Britten Sinfonia's version of Chorus: For Unto Us A Child Is Born (off "Handel's Messiah", 2009) almost dislodged me from my seat with the immensity of the recording venue's soundstage (St. John's, Smith Square, London). I had never heard the numerous voices with such definition. I could make out the fact that the tenor in the second row secretly picked his nostril at 1:23 into the track. Replacing the QuantaVibes cables with my AudioSearch Whiskey HDMIs ($300/3') demonstrated just how superior the QuantaVibes were and stepping down again to generic HDMIs ($20) resulted in either a collapse or dissolution of soundstage, leaving the voices decapitated, floating in space in one instance and the next congealed in an incomprehensible mess as if lying supine in a morgue. The joy was gone, the textures made bland, soulless. It was so obvious that anyone who could not tell the difference must be auditorily blind.

The same effect could be found with more pedestrian music. Consider the sitar on the Beatle's Norweigian Woods (off the 24-bit remaster of course). On the vast majority of HDMI cables (including very expensive ones I might add), they sound shrill, overly trebly, and ethnic. Through the Quantum Squeezer and ULTRA Cable, this instrument played with its full glory demonstrating George Harrison's connection with the numinous (perhaps aided by various hallucinogens?), altogether natural, at One, familiar. This level of sonic reproduction is priceless!

Finally, my luscious wife Candy wanted to participate in the audition.We cued up her favorite track from the Spice Girls - If You Wanna Have Some Fun. The soundstage exploded beyond the walls side-to-side, front-to-back; and the vocalization from the Girls were lined up beside each other - you could even discern the relative heights of these women! Candy squealed in delight exclaiming "I ain't heard it go so low before, Big Daddy!" Indeed, we had fun.

Readers, let me be perfectly clear about this. Forget all you have heard about "holographic" sound from inferior equipment. These cables offer HOLODECK sound. Miles Davis' spit could be heard and visualized dripping off his trumpet, Coltrane's sax keys rattled before my eyes, Elvis' hips gyrated in concert with his live performances, and Michael Jackson's lewd gestures beckoned beyond the grave off Thriller! Dare I say, this is the first time I have experienced digital sound even begin to achieve parity with my vinyl collection. Such was the presence. You know you want this.

Now, as per my agreement with Archimago, measurements are a pre-requisite for reviews of such gear on his blog (again, absurd). I lent him the QuantaVibes HDMI Squeezer and ULTRA Cable for a couple nights just before he went off on the plane. I'll be back in a moment after this unnecessary interlude...

Objective Analysis:

Okay, as Keaton said, I had the chance to measure his review cable with a couple other HDMI cables using the following setup just before I leave:

AMD A10-5800K HTPC with HDMI-A connector or ASUS Taichi with HDMI-D (micro-HDMI) --> Test HDMI cable --> Onkyo TX-NR1009 --> shielded RCA --> E-MU 0404USB --> shielded USB --> Win8 laptop for analysis

Cables tested:
1. HDMI "high speed" cable, ION branded, 6' long, used in my previous Onkyo DAC measurements. No problem with HDMI 1.4 functionality like 3D to HDTV. Cost - about $20.


2. Fancy 4m (~13') Energy branded HDMI with all the check boxes ticked for HDMI 1.4a. It's touted as the "Connoisseur" Series which I'm sure Keaton would approve of. High speed to "13.8Gbps" specified, ARC, 3D, ethernet, 4K... Even has a tag as seen in the picture with "Confirmation of HDMI ATC Testing" - ATC in this case means "Authorized Test Center" and for this cable, the center was "Dat Tran". Nice metal connectors and general cable build quality.

At $50, this is probably the most expensive cable I have and will be used between the Onkyo receiver and LG 3DTV in my new setup. Note that the upcoming HDMI 2.0 standard specifies data transfer rates up to 18Gbps but is backward compatible with high-speed cables so I hope this cable will do the job in the years ahead.


3. The review QuantaVibes Quantum HDMI Squeezer + ULTRA HDMI Cable. The HDMI Squeezer looks like a standard HDMI-A female to HDMI-D male converter capable of a 90-degree rotation. Although said to be "heavily modified", I do believe similar adapters can be found at the local Radio Shack :-).

The ULTRA Cable is "standard speed" - tested to be OK with 1080P with my TV and the ASUS Taichi ultrabook, but NOT fast enough for 3D video off my Panasonic BMP-TD220 Blu-ray player.

Starting with the usual RightMark measurements, here's the summary (all done at 24/96, HDMI WASAPI driver):

Frequency Response

Noise level
No difference folks! Frequency response, noise level, distortion levels appear indifferent to the HDMI cables used.
 
Let's look at jitter with the usual Dunn J-Test:



Hmmm, what's this? The QuantaVibes spectrum is more jittery - especially noticeable with the 24-bit condition. However, notice what's happening here. Both the ION and Energy cables are being measured off the standard HDMI connector whereas the QuantaVibes is off the ASUS Taichi laptop's micro-HDMI port. What happens if we use the "HDMI Squeezer" converter but with the fancy Energy HDMI cable instead?


Voilà, the jitter spectrum now looks like the one above with the QuantaVibes ULTRA HDMI cable. Basically what is demonstrated here is exactly what I saw with the TosLink, USB, and coaxial digital interfaces. The jitter spectrum is a function of the sending and receiving device. The cable itself does not change the pattern; in this case, the little ASUS Taichi ultrabook tends to show more jitter than the HTPC AMD A10-based computer. Whatever HDMI cable is used does not change the jitter pattern (although I suppose one could wonder whether the HDMI-A to micro-HDMI adapter has an effect; not likely).

Bottom line from the objective side: No evidence that HDMI cables make any difference to standard measures of frequency response, distortion, noise floor/dynamic range of the DAC (Onkyo TX-NR1009 in this case). Jitter remains a function of the active devices, not a property that varies with the passive cables themselves (at least within the reasonable lengths tested up to ~13 feet). I'm happy to be proven wrong if anyone else has good data especially with less jittery DACs than this receiver.

I am therefore at a loss as to Keaton's enthusiasm around this product.

Back to Keaton for his conclusions.
 

Keaton's Konclusions:

Bollocks, more squiggles from Archimago... Yet again, measurements remain insensitive and unable to achieve the resolution of my 73-year young experienced ears. Hence useless and invalid for audio evaluation. We all know that everything matters, even more so digital cables because there isn't such thing as digital according to these enlightened gentlemen. HDMI is of course the worst of all the digital connections for audio (some other enlightened gentlemen at Audio Asylum agree) which makes it so much more important that we spend more money on ensuring perfect digital transmission.

As a side note, I connected the ULTRA HDMI Cable by itself to my Blu-ray player and 85" 4K TV. I swear, the image was more stable, colors brighter, and the actors moved so smoothly and with such poise that B-movies seemed Oscar worthy. Likewise, the audio-video synchronization was even better with these cables that I wondered how I managed to watch movies without them! Here again, the power of jitter-free sympathetic Superstring resonance at work. Indeed, I will be ordering a separate set of ULTRA's just for the Blu-ray player when the final product is released. Nonetheless, I feel that without the HDMI Squeezer, the synergism just wasn't there. The sound didn't reach as deep, the trebles didn't quite touch the heavens; without doubt, you need the full set!

You likely are aware that so far I have not said how much these high-tech devices will be sold for. I was told the company is still perfecting the quality control due to the precise manufacturing standards and complexity of the patent pending process. Expectations are that both the HDMI Squeezer and ULTRA Cable will be priced as a set at the $3000 mark. By itself, the ULTRA Cable will be around $2000. Mere pocket-change for this level of sonic/video revelation - I bet your power cords costs about just as much and they only have 3 individual wire lengths inside at most, and require less precise shielding! This is very comparable to other high-end HDMI cables such as these or these or these especially given the improvements on the quantum scale!


With this premier product from QuantaVibes, I am confident that we will 'hear' more from this up-and-coming newcomer to the high fidelity audio scene. I have a strong feeling that Dr. Maltzarelli's research into Amazonian earthenware will yield many revelations into audio resonances for upgrading the sound room. It was with supreme regret that I had to return the review cable back to QuantaVibes after 3 weeks of audio bliss for fear of industrial espionage. Currently awaiting their formal release with bated breath and ample liquidity in hand.

Until next time; Magico wishes and Burmester dreams.

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* This cable is rated as "Standard HDMI".

Ed: And so ends the digital audio cable measurement quadrilogy. That is, until yet another digital audio interface shows up with fancy cable claims... Enjoy the music till then :-).