Friday, 5 March 2021

RETRO-MEASURE: Pioneer CT-S605 Cassette Recorder/Player (1989). On cassette quality / fidelity. Cassettes are "coming back"? And sentimental associations...

After the usual recent posts on DACs, DSP, speaker measurements, let's discuss something very different this week!

The other month, I was cleaning out some stuff from my basement and came across an old cache of "compact cassette tapes" which I had recorded back in my high school and early university years. I also still have a handful of old pre-recorded tapes that provided the soundtrack of those times in life.

Within this collection were some made in the mid-'80s until about the mid-'90s when affordable CD burners (~$500 I think around 1996) came on the market and I quickly shifted to making "mix-CDs" rather than mix tapes. In fact, I found some almost brand new tapes that I forgot I still had:

Left: Fuji DR-I standard Type I Fe2O3 "Normal Bias". Right: Maxell XL II Type II CrO2 "High Bias". Center: Sony Metal-SR basic level Type IV "Metal Bias" for "Digital Excellence" - back in the day :-).

Saturday, 27 February 2021

MEASUREMENTS: Emotiva Airmotiv B1+ bookshelf speakers. A comment about Andrew Robinson's Fluance Reference XL8S video review and "Do measurements ultimately matter?".

Emotiva Airmotiv B1+: Comes with small manual, and some stick-on rubber footers in the plastic bag. Fabric covers in background.

Since mid-2020, I've been on a quest to find some replacement speakers for my computer desktop. Along the path, I've listened to and measured speakers like my old AudioEngine A2, the active Edifier S2000 MkIII, borrowed the Tannoy REVEAL 501a, the passive Fluance Reference XL8S, and of course tried the KEF LS50.

For this post, let's look at the Emotiva Airmotiv B1+ 2-way bookshelf speakers (US$229/pair), released in early 2020. Externally, these look like their predecessor, the Airmotiv B1 that first came out in 2016. I bought this pair direct from Emotiva in late 2020, arriving a little before Christmas.

Saturday, 20 February 2021

REVIEW / MEASUREMENTS: HiFiBerry DSP Add-On with the DAC2 HD. A quick Roon 1.8 network/endpoint issue and remote access request.

This post is in many ways a continuation of the HiFiBerry DAC2 HD measurements presented last time with the devices sent to me by Doug Gardner for testing. For some background, this DSP Add-on is related to the BeoCreate project which was documented in this 2018 thesis in collaboration with Bang & Olufsen. The idea was to create an open-source system to allow consumers to build or update their own loudspeakers to be active devices. It looks like this DSP Add-On board leverages that software to do its magic.

As you can see in the thesis, the final BeoCreate product was a board which included 4-channel amplified outputs, digital S/PDIF input and output, DAC, and of course the programmable DSP subsystem. A Raspberry Pi could be added to provide network streaming capabilities.

For completeness, I want to mention that this DSP Add-On is also compatible with HiFiBerry's DAC2 Pro (~US$50-60) board. Notice that the DAC2 Pro is a less expensive DAC than the DAC2 HD and sports headphone out. The converter chip seems to be the TI PCM5122 (same as previous gen DAC+ Pro) based on what's listed in the specs sheet but I have not seen confirmation that is indeed the case.

Saturday, 13 February 2021


It has been awhile since I've measured any of the Raspberry Pi DAC HAT boards. In fact, it was back in 2016 that I got the HiFiBerry DAC+ Pro which I still use for basic streaming in the living room these days. Thanks to blog reader Doug Gardner, he sent me both his HiFiBerry DAC2 HD (~US$100) and DSP add-on (~US$60) boards you see above for testing. Doug was also very helpful in providing some background information and discussions on subjective impressions.

The DAC2 HD was released last year (around June 2020) and is based on the TI/Burr-Brown PCM1796 "Advanced Segment" DAC chip, an upgrade from the TI/BB PCM5122 found in the DAC+ Pro board. With the majority of my DAC measurements recently being ESS and AKM products, it's good to have a listen and look again at a TI/Burr-Brown-based product. Note that the PCM1796 is not a new component by a long shot! It has been available since 2004 I think (earliest specs sheet Dec 2003). My TEAC UD-501 and ASUS Xonar Essence One from 2013 were both based on dual PCM1795, a close sibling.

While I will be looking at the DSP add-on daughterboard (version 1.1, dated April 2020) more next time, for now, suffice it to say that this is based on the Analog Devices ADAU1452 chip, a 32-bit, 295MHz DSP.

Saturday, 6 February 2021

RETRO-MEASURE: Spendor SA1 (1976) monitor bookshelf speakers (The foam tweeter ring tweak!? And on "Listen For Yourself!".)


For this week's blog post, let's have a look at another "retro-measure"! This time, I had the opportunity to listen and test out the early-version Spendor SA1 speaker which hails from 1976. Remember that over the years, Spendor has released newer versions of this "classic"; most recently around 2009 as reviewed here in Stereophile.

This is another speaker I borrowed from my friend linnrd and I spoke about it back in late 2019 when I visited his place. This time, let's have a proper listen with measurements and compare the performance objectively and subjectively!

The "Spendor Mini Monitor Type SA1" came out just before the classic BBC LS3/5A design around 1975. Like the LS3/5A, these monitors were designed to be used in mobile recording vehicles.

Saturday, 30 January 2021

REVIEW/MEASUREMENTS: SMSL (S.M.S.L.) M100 Mk II Hi-Res DAC (USB, S/PDIF Toslink and Coaxial In, ESS Sabre 9018Q2C, below US$100)


[Disclosure: Over the years, I have measured and reviewed products I have either bought or borrowed from friends. The product discussed in this post was sent to me by Aoshida Audio for an honest review and impressions which I can keep to use. It would only be fair that I provide the free shipping and "lowest price guarantee" links to Aoshida if readers want to purchase this DAC or others discussed. Considering that a major part of my review process is objective in nature and standardized over many years, I trust that much of what I present will remain free of bias. Note that I will be selective of what I agree to measure/review of this nature - accessible and high fidelity products that might be of interest to readers, or more innovative devices will obviously be most appropriate for what I do.]

As you can see in the image above, today let's have a look at another very inexpensive DAC product from S.M.S.L. with high-resolution ability. Over the years, I have reviewed/measured other devices from this company including the SMSL A6 integrated amp, the SMSL iDEA DAC, and more recently I've been enjoying the SMSL SA300 Class-D desktop amplifier. These are examples of "accessible" audio products, well within the price range of basically any music lover, "audiophile" or not.

So it is with this DAC. The S.M.S.L. M100 Mk II currently costs less than US$95, needs little power, and accepts USB/TosLink/Coax S/PDIF inputs. As you can see, it's shaped as a rectangular prism. The size is smaller than the photo might suggest measuring at about 2 1/8" x 2 1/4" x 3 5/8" long, weighing around 0.5lb (250gm). The enclosure is aluminum with shiny plexiglass front panel; the package feel solid. Inside the box is an assortment of printed manuals in English, Chinese and Japanese along with a basic white USB-A to micro-USB cable.

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, 16 January 2021

RETRO-MEASURE: Radio Shack / Realistic / Tandy Minimus 7 speakers (early 1980s, Cat. No. 40-2030A)

While the "latest and greatest" gear is always nice to check out, read about and measure, over the years, I've also loved the opportunity to examine some of the vintage, "retro" stuff from back in the day. For example, today we have a pair of all-metal, black, Realistic (Radio Shack / Tandy Corp.) Minimus 7 speakers from the early 1980's.

These were "classics" back in the day, found in many college dorms, restaurants, doctors' offices and available for sale at your friendly neighborhood Radio Shack for >25 years. For some more history, check out this page.

Saturday, 9 January 2021

MEASUREMENTS: ELAC Debut 2.0 A4.2 Atmos Speakers

Well, with the pandemic of 2020/2021, one thing that has changed markedly in my family is that we're spending way more time watching movies and miniseries at home this past year. In fact the last movie I watched at the local "cineplex" was 1917 right before the Oscars on February 9, 2020. As such, 2020 has been a year of microwave popcorn, Netflix, Amazon Prime Video, Disney+ and the occasional UHD Blu-Ray played on my Oppo UDP-205 with the family on the sofa.

Wanting to use the Energy C100 bookshelf speakers elsewhere (see what I was doing here), I figured it was time to grab a pair of actual "Atmos elevation speakers". Not unexpectedly, the ELAC Debut 2.0 A4.2 Dolby Atmos Add-On Speakers were on sale before Christmas which you see in the image above.

Friday, 1 January 2021

MUSINGS: Noise, Jitter, Faith & The Autistic Fantasies of Digital Audiophilia ("For adults only?" Darko/Lavorgna conversation.)

Happy New Year dear audiophiles!

I hope 2021 brings with it many happy returns in the year ahead.

Note that this post will be of a rather critical tone... So if on an auspicious New Years Day you want something a little less confrontational, I suggest coming back another time :-).

Let's address something which I think many well-heeled digital audiophiles will probably have observed being discussed if they read typical "mainstream" audio magazines, online sites, or watch associated videos. It's the simple observation that when it comes to subjective-only reviewers discussing why something (often expensive!) can improve the sound of a digital system, it almost always comes down to 2 factors they want you to be concerned about:

1. Jitter
2. Noise ("electrical", RF/EMI, conducted/induced)

Monday, 21 December 2020

As We Hear It: A High Dynamic Range Christmas Playlist by Allan Folz

A High Dynamic Range Christmas Playlist

[Guest Post by Allan Folz]

For this Christmas I'd like to share with Archimago and readers the albums that have become a large part of our family's holiday tradition.

In the old days, when all our music was on CD's I'd load up the 5 disc changer with these albums the Sunday after Thanksgiving and they were almost the only holiday music we'd have for the next month. Streaming wasn't a thing in the early Internet years. You listened to the albums you had and you liked them.

I bought all but one of these CD's more than 20 years ago and got them largely by (some really good!) luck of the draw. For the longest while I thought they were my favorites because they were such a constant part of our lives from Thanksgiving to Christmas. Later, after I learned about dynamic range I realized it made perfect sense that they were my favorites.

After getting more deeply involved in the hobby I discovered that all my favorite albums had a high dynamic range. This was interesting to me because I had formed my opinion on my favorite albums long before I'd learned about album dynamic range. Only after looking at the dynamic range of my favorite albums did I realize that almost always the common element was a high dynamic range. The corollary also held true. The albums I bought that were disappointing once I got them home and had a few listens had a low dynamic range.

Saturday, 19 December 2020

MEASUREMENTS: Tannoy REVEAL 501a powered monitors

Today, let's have a look and listen to the speakers you see above.

These Tannoy REVEAL 501a, though discontinued now and replaced with the newer Tannoy REVEAL 502 released in 2014, have been well-regarded over the years in home studio use (check out some user reviews here and on Amazon). They were first released back around 2010 and there's a good Sound On Sound write-up from mid-2011. These were budget priced at <US$500/pair on release (typically sold as individual speakers) although over the years, could be found for a relative steal down at US$200/pair.

These are biamped powered speakers - 40W mid/bass and 20W tweeter, unknown without opening them if these are Class A/B or D amps. There's a 1" soft dome tweeter, 5" mid/woofer, flared front port, and the box is MDF with curved front baffle. Dimensions are 11.9" x 7.3" x 9.4"; relatively small speakers. Each box is individually powered unlike the AudioEngine A2 or Edifier S2000 Mk III previously discussed where there is a cable tethering the speakers together, weighing about 6kg and quite solid in the hand.