How much can be measured -- and how much cannot?


There has been a lot of discussion over the years on Audiogon regarding the measurement of components and other audio products. Some people claim everything is either measurable now or will one day become measurable with more sophisticated measuring equipment. But others say there are things in high end audio that will never me measurable and that measurements are really not that important.

Here is a typical example -- a quote taken from the Stereophile forum regarding their review of the Playback Designs MPS-5:

"JA 2/17/10 Review Measurements of Playback Designs MPS-5
Posted: April 13, 2011 - 8:42am

John Atkinson's 2/17/10 review measurements of the Playback Designs MPS-5 revealed less than stellar technical performance even though Michael Fremer really liked the player. I've included JA's closing measurement remarks below followed by the manufacturer's comments.

To my knowledge there was never any followup in Stereophile regarding the manufacturers reply the MPS-5 could not be adequately measured with traditional measurement techniques.

I believe Stereophile should respond to this reply in the interests of its own measurements credibility.

Len"

How important do you think measurements are? Are the ears really the only true arbiter?
sabai
Newbee and Unsound, I certainly would take no exception to your centering on specs that you find closely associated to your tastes, but I will continue to trust my ears. I have never found any measures other than whether the unit is on or not that are associated with quality music reproduction. Michael Fremer and I certainly are in total agreement about the WAVAC SH-833 monoblock amps. He is the only reviewer in Stereophile or TAS, that I would trust in recommending a component.

At one RMAF, John Atkinson presented a seminar where he had a Boulder amp and an unnamed amp hooked to a THD meter. Under various loads the unnamed amp was horrible and the Boulder exemplary. He went on and on. He had no capability to listen to the two amps. Having heard the Boulder and not liking it, I asked whether he thought the designer of the unnamed amp thought THD was a major concern in design. He was flabbergasted as were most in the audience. I left.
Sabai,

The problem with that is when its all said and done you are still just getting opinions which will lead you to believe that one of three things have occurred; 1) the measurement is inaudible to the most sophisticated ear using the most sophisticated equipment which as to that particular measurement it is meaningless except there it is on the test equipment; 2) that these same folks with the same equipment can hear the the effect of the measurement but thinks it doesn't materially affect the sound they deem important; or 3) that their listening skills or equipment are not up to standard for evaluating equipment, or that they just can't hear it because of their actual hearing limitations. What would a magazine have to gain by pursuing the testing/review you suggest. The finding has to affect the magazine and/or its reviewers negatively.

Interestingly I can think of one internet mag that uses two reviewers on many/all of its review who review the product separately. They publish each review but make no attempt to reconcile any differences which there often are.

Hobby magazines in general rarely publish negative reviews of anything, its just bad for business. As close as they will come is when someone like Adkinson measures spec's and points out deviations from manufacturers spec's or things HE thinks are meaningful for users and lets you draw your own conclusions whether you feel they are relevant, or on a rare occasion a reviewer will parse words in a way that MIGHT alert a potential user that it ain't up to snuff. But the reader has to put on his thinking cap to sort it all out. That is why personal knowledge is so important.
For me, the ears must be the first guide, and are much more important than any spec or measurement. One must listen to many different types of equipment/systems and decide what one's priorities are sonically. Only then can one begin to use measurements and specs to help in a purchasing decision, by learning how and why the equipment types you like sound like they do. At least, this was my approach, since I was/am not very mechanically inclined at all, but I am blessed with very good ears, and as a professional musician I live the "absolute sound" literally almost every day. Very, very often in the world of audio reproduction, the equipment that measures "best" does not actually sound the best. So the actual measurements may not be very important, depending on one's priorities. What is more important, after one has determined one's priorities, is figuring out which measurements/specs are more important to you, and why, based on what you hear/want to hear. Hope this makes sense, I'm tired and probably shouldn't be posting right now. :)
Newbee,
You're absolutely right. You will rarely read a negative review. And if anything negative is said it is usually couched in terms that make it sound not so bad at all, really. Or a matter of personal preference. You really do need to read reviews with your thinking cap on.

Regarding Stereophile reviews, my point is not that we have 2 reviewers commenting on the same aspects of the same products on Stereophile. If this were the case, two differing opinions could easily stand side by side without the need for further explanations.

What we have at Stereophile is 2 reviewers commenting on different aspects of the same products. When you have the latter happening and John Atkinson says "I don't know how he (the reviewer) could have liked the product given my measurements", he is implying that his measurements supersede the ears of his esteemed colleague.

This is a whole other ball game. Under these circumstances, I think it behooves John Atkinson to sit down and have a listen to the component under review with the reviewer whose ears are being called into question. Otherwise readers are left to consider what it all means without any attempt by the magazine to clarify matters.

The choices are:

1. The reviewer must be right since he is the only one of the 2 who actually listened to music on the component.
2. John Atkinson must be right because measurements are more important that the ears of a reviewer.

Leaving readers in limbo to sort out a matter that could have been clarified or reconciled by the 2 people in question getting together (but not doing so) is not the best way to present audio reviews in a widely-read audio magazine for high end consumers. IMO.
LOL, while your choices are correct I do not think they are the only ones available. You might choose to think that not only Atkinson's valuation of the results of the component's deficiencies might be wrong, but so could the reviewers conclusions from his listening sessions.

One of the things all audiophiles experience in evaluating components is recognizing initially everything that is happening at one time. Usually subtle changes brought about by components deficiencies only creeps in with time, sometimes a long time. I'll spare you examples. But in this case I think it sez a lot about JA's integrity (if not his sonic preferences) that after discovering the measurements discrepancy he didn't simply call Fremer and tell him what he measured which would have allowed Fremer to incorporate it in some way in his review. A very pratical solution from a PR point of view - nobody loses and the audience never knows.

Interesting.................