Ceiling Absorption Panels (AudioSilk branded PET material 2'x4'x0.8", doubled thickness).

With the recent discussions about room acoustics and treatments, I thought it would be good to continue on this theme and move forward with the next logical step for my listening space. Let's talk about ceiling sound absorption as you can see installed in the picture above.

For years, I've been thinking of doing this but really didn't want to put something up there that could damage the walls. I definitely would prefer not to drill holes unless absolutely needed. Recently, I had some positive experiences with 3M's Command Strips when I put up some picture frames and artwork around the home. These double-sided tape strips were designed to be removable without damaging painted walls. Looking around at options, it seemed that this could be a reasonable ceiling installation solution within weight limits.

On Amazon, there are various options for acoustic absorbers these days. I settled on a package of 4 sheets of 0.4" thick x 2' x 4' AudioSilk-branded polyethylene terephthalate (PET, non-toxic, non-irritant, made typically from recycled plastics like bottles) absorber panels at a good price (~US$110) along with some strong 2-sided tape for doubling up the panels for thickness and of course the 3M Command Strips to stick it up on the ceiling.

On Envy, "Cope", and just plain Reality in Audiophilia. More GR-Research/Danny Richie drama.

After writing the articles looking at room acoustics over the last month, I thought this would be a good time to discuss another observation about the psychology and culture of the audiophile hobby and some of the claims that people make.

As I noted last time, room treatments like the IKEA Mittzon absorption panels are far from the exciting products highlighted in magazines each month or even popular forum topics commonly discussed. While they do review realistic, non-controversial room treatments once awhile (like this), I would find it shocking if one day I opened an issue of The Absolute Sound and saw an article reviewing the Mittzon panel!

Sound Absorption: IKEA Mittzon Floor Standing Panel (+ GIK Acoustic panel).

Greetings audiophiles. Finally, I'm back home in Vancouver after my Asia trip. I love traveling but there always comes a time to look forward to "Home, sweet home." And music to listen to in my personal sound room of course!😌

In this post, let's talk about perhaps one of the most boring things you could buy - a sound absorption panel. Made all the more pedestrian because this one comes from IKEA. At a retail price of US$230 each for the smaller (but IMO adequate for my home audio) 27.5" x 61.75" x 3.125" panel, the IKEA MITTZON Floor Standing Acoustic Screen is inexpensive and easy to find. There is also the larger 35 3/8" x 61.75" model if you prefer for just a little more - US$250.

While this may look boring, I must admit that as I've experienced more and dare say, "matured" in this hobby, the most interesting upgrades do not have to be high-tech active gadgets, bear fancy brand names, or the stuff that seems to capture the latest hype.

No friends, always remember the most important components that contribute to sound quality! Digital technology in particular has reached levels of performance where diminishing returns are quite easily reached these days. Make sure to explore other "domains" and products in your search for high fidelity audio.

Audiophile Malls Asia: Highsun/Haiyin Plaza - Guangzhou, China. (And thoughts about China and the global order.)

Last time, we talked about Seoul's Yongsan ETLand, so moving along in my Asia trip, let's check out another audiophile mall, this time in Southern China, in the city of Guangzhou. I've been in this city before (as per 2016 post) but not at this exact location, the Highsun/Haiyin (name used interchangeably) Plaza.

It looks like in the last 10 years, this place has really become quite concentrated with many audiophile stores.

Audiophile Malls Asia: Yongsan ETLand - Seoul, S. Korea

I don't know about you guys, but I'm like one of those husbands/boyfriends/partners who sit outside surfing the web at women's clothing stores. So while "the girls" were out shopping and getting pedicures in Seoul, I decided to take a couple hours' detour to the Yongsan ETLand which is about a 10 minute walk away from the massive Yongsan subway station (take Exit 3).

I suspect in the Western world (North America and Europe), it's quite rare to find a good concentration of stores selling hi-fi hardware any more, if even this was ever the case. Unless one is fortunate enough to have a large dealer in town, audio shows seem to be the only place left to see a large number of brands under one roof. However, as you might remember for past articles (like this, this), in Asia, the concept of an "audiophile mall", or "hifi-mall" still exists, so let's document some of these places in 2026... this time, we take a peek in Seoul.

Small Room Acoustics: Example of impact with (ultra) high-end speakers in Stereophile. (On AI audio writers, and Asia vacation pictures. 😊)

Last time, we discussed small room acoustics and audiophile listening rooms. In that article, I used an idealized loudspeaker with flat frequency response from 40Hz up. As I'm still traveling, away from my gear, I figured for this article, let's look around published data in audio articles to examine room effects and consider what this means.

One widely available and consistent source of objective data over the decades comes from Stereophile. While there are clear examples in the magazine where they perpetuate the "woo" in audiophilia, I appreciate that they do provide measurements for audiophiles who can read graphs and consider the technical performance of devices beyond subjective claims of how "great" something sounds, at some point in time, to someone, in some nebulous-quality sound room.

So let's take a look at a very recent Stereophile article - this one reviewing the Marten Mingus Septet Statement Edition loudspeakers - and consider the effects from room acoustics. Clearly, at an asking price of US$200k/pair, we're in the zone of "ultra high-end" luxury audio hardware. These speakers would be way above and beyond what the vast majority of audiophiles (never mind "music lovers" at large!) would ever spend.

Audiophile small room acoustics: complex and essential.

In the post "What are the most important audio components?" a few years ago, I said that we need to understand the various audiophile "domains": audio hardware, room acoustics, quality of your music, and of course personal mental engagement. Each of these have a part to play in the achievement of and personal judgment around sound quality.

Of those domains, it's hard to speak about personal mental engagement as this is a highly individual exercise (and related to one's auditory acuity). The quality of the music we listen to again is related to not just personal preferences (like genre) but also what mastering quality and variants like hi-res, multichannel, and on what format (SACD, vinyl, etc.) the record label makes available of our favorite albums.

It's always tempting of course to get excited about audio hardware - the latest toys. For example, recently, I heard that Andrew Jones has another ported box speaker design with paper/fabric drivers, this time with a coaxial tweeter+midrange that's based on field coils / electromagnets, paired to the permanent magnet woofer at something like USD$34k. While I'm sure this could be a compelling design for many, I think we can also recognize that these days, as equipment fidelity has improved significantly to the point where a simplistic "high price = high quality sound" equation no longer works, it's maybe wiser to direct our attention to the other domains.

This then leaves the very important issue of sound room acoustics, an area that we can all to some degree optimize (see also previous discussion on the sound room). I have heard it said that the sound room is the "foundation" from which we build our hi-fi sound system. As with any project, without an adequate foundation, no matter how great the rest of the system may be, you can only achieve a ceiling of performance dictated by the limits of that foundation.

In this post, let's dive a bit deeper into the importance of typical domestic small room acoustics and general principles around achieving good sound quality.

MUSINGS: On high-end audio component prices, inflation, April Fools and peak "greedflation"?

 

Let's consider how over the last while even audiophile magazines have wondered about the High-End Audio Industry's escalation in suggested retail prices for their products.

A year ago, Stereophile attempted to answer "Why Hi-Fi Prices Have Risen". To be fair, I think Jim Austin in the article made some good points about inflation, tariffs, etc. I'm glad that the article also acknowledged the fact that for years now, each generation of "high-end" audio products seemingly have also been just getting more expensive, untethered from inflationary expectations.

Grab a nice beverage, have a seat. Let's talk about prices in audiophilia. Is it true that the "high end" has become much more expensive?

[Some of these thoughts will trickle into the psychology of other luxury products beyond audio. Also, we'll be talking about dollars and cents in this post. Since most audiophile goods are priced in US dollars, let's use that through this post, with early April 2026 currency conversion as needed.]

Crosstalk Cancellation/Ambiophonics: Updated CTXMatrix Lite with standalone processor & 60° speaker angle support.

Significant changes in the UI from the previous CTXMatrixBeta release.

I want to remind 2-channel "immersive sound" lovers about the potential for using stereo crosstalk cancellation (XTC) / ambiophonics playback to enhance the 3D soundstage. You might have already heard of uBACCH in the audio magazines and on forums - why not try a similar effect for free (or through a small coffee donation)?!

You might recall, last year STC contributed a post on CTXMatrixBeta DSP for Windows. Well, it's great to see that he has continued to develop the software with updated user interface and abilities, this latest edition renamed CTXMatrix Lite, currently at version 1.3. It now includes a standalone processor which I'll spend some time discussing in this post, along with the 64-bit VST3 plugin as shown above that can be used in JRiver, Audirvāna and DAW software like Reaper.

Furthermore, there is now a VST3 plugin for Linux. Since I primarily use Windows for my music listening and processing, I'll stick with the Windows variant here with the hopes that some of this will be applicable. In my discussions with STC, he's aware of interest from Mac OSX users.

Perhaps the most important update in the last few months is that there is now improved support for standard ~60° stereo speaker angle (typically, the recommendation is 20-30° in ambiophonics). As a result, one should have a much better experience with the effect on most set-ups. In particular, hopefully more desktop computer music lovers will give this a listen without needed to move the speaker position and explore what you might be missing in your existing music library.

[If you run a miniPC streamer in the sound room like I do, CTXMatrix can easily be used like with HAF X-talk Shaper DSP discussed a couple years ago.]

Do HDMI cables make a difference for IIS/I2S/I²S-HDMI audiophile DACs?

It's taking a bit longer for my testing of the inexpensive I²S/IIS/I2S-HDMI DDC boxes due to some unexpected results which I'm chasing down currently; hopefully that gets resolved or understood soon.

In the meantime, let me address something that folks might be curious about related to this topic of the I2S-HDMI interface... Does the HDMI cable make a difference to the sound quality?

As with much of audiophilia wherein some members of the culture have the belief that "everything makes a difference", obviously this is not the case and I do not recommend this kind of mindset. There are many things that don't make much, if any difference (as discussed here and here) based on experience and understanding principles of the technology.

Since I have not seen measurements examining the effect of HDMI cables on I²S performance from a DAC, let's do some testing here.

Visit to a "more subjective" leaning friend. And something like Synergistic Research "Transducers" (HFT, GCT, ECT...) to try.

Hey everyone. I'm still waiting to finish the measurements and write-up of the USB DDC boxes discussed last time (a few things I need to double check on!). In the meantime, I thought I'd share some thoughts and pictures with you of a visit I made to a friend, Paul's, place. You'll see that he is much more of a "subjectivist" than I am.

Above, we see his listening room which is capable of multichannel playback as well for music and movies. He's a multichannel enthusiast who values the immersive experience and has a large library of surround content in PCM and DSD - great to see!

Clearly, Paul is a Linn fan with almost an all-Linn system. He has front Linn Akubarik Exakt (Katalyst) active speakers, an Akurate 225 center channel, and a pair of Akudoriks as rear/side channels. Over the years, he has been experimenting with Linn Space Optimisation and wrote an article about his experiences (he contacted me after he saw my tests with Linn SO last year).

Inexpensive USB2.0 Digital-to-Digital Converters (DDC) Pt.1: Douk Audio U2 PRO (Upgrade Version) and SMSL PO100 PRO - initial look, about I²S-HDMI. In praise of unofficial Atmos mixes!

This SMSL unit also does MQA decoding for those who want the feature. Unlike the Douk, this box only has an LED to indicate MQA decoding status but does not tell us the PCM or DSD samplerate.

While I've tested some inexpensive devices (like the Topping D10s DAC) which have the ability to convert USB 2.0 input into S/PDIF output, I have not specifically looked into these Digital-to-Digital Converter boxes which some audiophile reviewers (like this fellow, and this) seem to rave about.

For me, there just hasn't been any reason to be particularly interested since other than conversion from one interface type to another, the other promise of such devices - the reclocking capability - just hasn't been of great interest to me. As far as I can tell from listening, it's not like jitter has ever really been much of an issue unless severely bad for any decent modern device I've ever come across even at low price points (nor was jitter really an issue even with old CD players)!

However, since I have not tested I²S/I2S/IIS, I figure I'd buy both the Douk Audio U2 PRO 2025 upgrade version (US$63; Amazon Canada) and SMSL PO100 PRO (US$74; Amazon Canada) boxes to try out; have a listen and run some measurements. Unfortunately due to time limits, I'm not quite ready to show the measurements yet, so keep an eye out for those results, perhaps next week! For now let's just introduce you to these devices and talk about the I²S-HDMI connection.

As typical of the majority of my reviews/critiques, I bought these through retail channels.

Images from San Francisco: Audio Vision SF, B&O Flagship Store, Amoeba Music. Question of greater importance: music or gear?

It's an interesting experience I think to pop into local "brick and mortar" audiophile stores when traveling (like this, this, this over the years). This past week, I've been in San Francisco visiting family. We happened to stay within walking distance from what I think is the most well-stocked audiophile gear store in the city - Audio Vision San Francisco - located in the Nob Hill neighborhood. They're opened on weekends, closed on Tuesday, and by appointment on Mondays.

Chatting with the salesperson, I was told the store opened about 26 years ago. I suspect most audiophiles will be impressed when you walk into the store and see their selection of gear sitting in the hallway!

More Audio Potpourri: What's the best sample rate converter? The other father of MP3 (James D. Johnston "JJ"). Are measurements important? And TAS' "objective" confusion.

For this post, let's discuss a few other audiophile items that have come my way in recent weeks.

First, let's talk about something I haven't brought up for awhile now: sample rate conversion (SRC).

A few weeks ago, Spoon (a.k.a. Steven Elkins of Illustrate) sent me an E-mail about his new src.hydrogenaudio.org page evaluating and ranking the qualities of various software sample rate converters. I believe the page has been online since late 2025. Check out the forum discussion about the project as well.

Audiophile Potpourri: December 2025 web traffic among audio sites, price of cables poll, and flashback 2014 while looking ahead.

Let's have some fun this week on miscellaneous topics.

Occasionally, I'll highlight items I've either written or found on audio discussion forums I think would be good to share. One reason I decided to start doing a blog beyond just contributing to forum discussions was precisely because while the public forums are great for interactions with community members, meaningful posts often become obscured behind pages and pages of chit chat, irrelevant responses, and sometimes unpleasant arguments.

[I've unfortunately witnessed situations where very meaningful threads are closed off prematurely based on the bias of moderators. Even worse, threads with useful discussions might be erased entirely from existence which I feel is an slap in the face of well-meaning participants who put their time and efforts into thoughtful reflections. This is nothing new in the audiophile world; for example last year Stereophile scrubbed their website of all public comments accumulated over decades!

While I acknowledge the right of a website's owner to do such things, that doesn't make it any more palatable. I certainly understand the need for moderation in removing nonsensical, trollish, unethical, or crude statements that add nothing to promote thoughtful discussions.]

Speaking of forums and websites, I thought here in early 2026 it would be fun to explore website traffic numbers of some of the most common audiophile/audio sites using a common metric. One can get monthly visit numbers from Similarweb for free, a well-known website traffic tracker.