Audiophile drama is unfolding as an Audioquest HDMI cable demo, featuring an Audioquest employee, and showing unrealistic changes in sound, was seemingly debunked as fraudulent by Mark Waldrep, aka Dr. AIX, in a recent blog post. A subsequent "Open Letter" from Audioquest owner William Low admitted he heard the video a year ago, found the audio difference "unbelievable", but did not ask to have the video removed until after Mark Waldrep published his findings a year later. If the audio was manipulated to show a difference where there was none in the hopes misrepresenting the actual difference and selling more cables, this is fraud. Is this an isolated incident, or just the latest in a string of misleading behavior perpetuated in the high-end cable industry?

Before reading the article, we recommend watching our recently added YouTube Video discussion on Audioquest and other questionable demo practices we've experienced.

Potential Audioquest Rigged HDMI Demo YouTube Video Discussion



Summary of Events



Let's start with a summary of events. Mark Waldrep, aka Dr. AIX, is the company founder and Chief Engineer of AIX Records and one of the leading advocates for true HD-Audio. He recently came across a YouTube video, hosted by Home Entertainment by D-Tronics and featuring AudioQuest Regional Sales Manager David Ellington, which purported to show the audible difference of replacing a generic HDMI cable with AudioQuest Pearl, Forest, and Chocolate HDMI cables by playing a sound clip recorded through each cable. Mark measured the sound clips from the YouTube video, which you can see in his blog post.

The measurements were subsequently confirmed by user "amirm" in this forum post.

Each successive AudioQuest cable was louder by several dB and toned-shaped in a way that simply couldn't have come from switching cables alone, implying purposeful manipulation with the intent of convincing customers to buy a cable that did not do what it was advertised to do.

While we saw the video several days ago, we can't link it for you as it was removed once this story started picking up steam. AudioQuest claims that they do not have a copy. Mark Waldrep claims that he does have a copy, and will be willing to provide it to AudioQuest if they are unable to secure a copy from D-Tronics.

Editorial Note About HDMI It's important to note that HDMI cables transmit digital signals, NOT an analog waveform. This means the cable either works or doesn't. There is NO scientific proof that an HDMI cable can alter the sound of the signal being transmitted. Good cables pass the entire signal uneventful. Bad cables will either cause an interruption in audio (aka. audio drop out, or a snowy picture). We covered this in great detail in our detailed article: The Truth vs Hype in HDMI Cables and related YouTube Video embedded within the article. As a result, we place very little credibility in manufacturers that claim otherwise and you should as well if your goal is pursuing the truth in audio and video NOT deceptive marketing practices.

unless an HDMI cable is damaged there will be NO audible difference

Our Perspective

To our knowledge, no one has ever produced test results showing measured, audible results coming from different HDMI cables, or any digital cable, for that matter. The position here at Audioholics on digital cables is clear; from a performance perspective, unless the cable is damaged or otherwise failing, there will be no audible or visual difference. When there is damage or the cable is otherwise failing, the results are not subtle and can be clearly shown as we did in this video (check the 0:40 mark).

We have to agree with Mark's assessment; the results in the AudioQuest/D-Tronics video could only have been attained by fraudulently manipulating the recording or process. The question is, who committed the fraud?

Figure 1 – The spectra of the tune played in the AudioQuest promotional video on YouTube courtesy of realhd-audio.com



Note: it's impossible for an HDMI cable alone to cause a level shift in signal.

AudioQuest Owner William Low has responded with an open letter published on their facebook page. In the letter, he acknowledges that, approximately a year ago, he heard the the "unbelievable" video, but was assured that it was legitimate by D-Tronics, and subsequently, did not ask to have the video removed until after Mark Waldrep published his findings a year later. In his letter, William Low squarely points the finger at D-Tronics for manipulating the audio.

William Low has also made subsequent posts in the comments section on a Stereophile page republishing the open letter under the username "WELquest". He acknowledges that the advertising is fraudulent, but re-asserts, "neither David nor AudioQuest had any part in the decision to make a video, or in the production of the video." He also states that, "because in person, the cable differences are subjectively obvious, the very surprising video, while seeming dubious, did not seem completely implausible." Again, the audio clips in the video had differences of 8dB between the generic and "Chocolate" cables between 4kHz-17kHz according to Mark Weldrep's measurements. Again we must reiterate an HDMI cable alone CANNOT be responsible for a level difference!

The Home Entertainment by D-Tronics store have not responded. It remains to be seen whether they will deny the manipulation and stick to their claim that the sound differences were due to cable switching alone, whether they will point the finger back at AudioQuest and claim the AudioQuest was aware of the manipulation, or take the blame on entirely themselves. Or, as their lawyers are likely advising them, they'll just NOT address the issue at all and hope it goes away.

AudioQuest has a long history of using psychological trickery in their demos. We've documented these practices in their Boombox Demo, shed light on their questionable science, and given them ample room on our website to make their argument for trusting your ears over test equipment. That said, going beyond simple bias and suggestion to the point of actually manipulating demos to give the preferred results is not something we've seen AudioQuest do before, and if we had, we certainly would have told you in our pursuit of truth in Audio and Video.

Conclusion

From where we sit, denial letter or not, things don't look good for AudioQuest given their history of demo trickery and pseudo-science. Let's not forget, this is the same company that slaps a battery on the dieletric of their premium cables as some newfound science that allegedly transforms the audio experience. If Home Entertainment by D-Tronics takes the blame, and AudioQuest is vindicated in the case of this fraudulent video, we hope that they change their marketing practices going forward, quit relying on deceptive demos, and focus on making good quality products that back up their price tags with real, not imagined, performance that can be backed up with real-world tests. Pretty looking, expensive cables may have their place for those that love audio jewelry and want to dress up their system. But, in this day and age, psuedoscience should not be the primary driving force to sell the products to the uninitiated.

Tell us what you think about this situation in our forum and vote in our poll whether Audioquest or D-Tronics is to blame for these cable shenanigans.

Also, feel free to give Audioquest Direct Feedback about this situation on their Facebook page.