Nearly all manufacturers do not advertise/exhibit their product measurements? Why?


After my Audio Science Review review forum, it became apparent that nearly the only way one can determine the measurements of an audio product is wait for a review on line or in a publication.  Most equipment is never reviewed or is given a subjective analysis rather than a measurement oriented review.  One would think that manufacturers used tests and measurements to design and construct their products. 

Manufacturers routinely give the performance characteristics of their products as Specifications.  Those are not test measurements.

I searched the Revel speaker site for measurements of any of their speakers and could not find any.  Revels are universally lauded for their exceptional reviewed measurements.  Lack of published manufacturer measurements is true for nearly every speaker manufacturer I've searched for on line, perhaps several hundred.   Same is true for amps, pre-amps, DACs, transports, turntables, well you get the picture.  Do they have something to hide?   I doubt the good quality products have anything to hide but poor quality products do.  

ASR prides itself in providing "true" measurements that will aid in purchase decisions.   Why don't the manufacturers provide these measurements so that reviewers can test if they are truthful or not?

Then there are the cables and tweaks for which I suspect that there are inadequate tests available to measure sonically perceived differences but which objectivists believe don't exist or are "snake oil."  

Well, please chime in if you have some illuminating thoughts on the subject.   

I would have loved to see manufacturers measurements on my equipment and especially those that I rejected.  

fleschler

@kota1 

@amir_asr , OK, thanks for sharing. The last time I did the test you just posted was when I auditioned a Mapleshade Digital Interconnect I had for a 30 day trial (about $250). After about 100 hrs of break in I "blind tested" it with my current cable and it was MUCH better so I kept it.

Well you made a big mistake.  If I predict the outcome of a coin flip, do you think I can do that forever?  It could be pure luck, right?  What if I did that twice in a row?  Still could be luck.  How about 4 times?  Yes, it could still be luck.  Indeed I have run blind tests where I got it right 4 or 5 times only to completely fail after that.

If you go back to the start of the video I linked to, I explain the above.  And how claims of "I ran a blind test" mean nothing unless they are repeated and backed by that statistical analysis to reduce the chances of pure luck.  For this reason I keep saying run a test 10 times and see if 8 out of that many tests you can identify the cable. 

If a cable is "MUCH" better, you should be able to tell it apart 20 times and still get it right.  So fire up your camera, start shooting a video of how many times in a row you can tell that cable from another.  Then we have something to talk about.  Until then, the only thing you demonstrated is that you still don't know how to properly get to audio truth.

Also, nothing about your anecdote validates the requirement for 100 hours of break in.  You need to go and get a fresh cable and compare it to the 100 hour broken one and see if you can get at least 8 out of 10 times right.  You say the company gives you 30 days free trial.  So when can be expect this result?

Until then, your starting claim in ASR that Audioquest cable needed 100 hours of break in before testing is just nonsense.  Heck, that cable is even different than yours so how can you claim both need the same 100 hours???

@kota1 

Are you here to throw more spitballs again? The guy that measures doesn't have any measurements about his own system? Embarrassing. If you are experiencing "technical difficulties" please post what they are and I am sure I can help, NP.

Thank you for the offer. But before you volunteer time to help me, see if you can help yourself in your audio beliefs.  Per above, I am still trying to figure out why you claim 100 hours of break is mandatory for a cable.  Or answering OP's question of why cable measurements are not provided as I do every time I review one on ASR.

Remember, earlier you claimed I had never run double blind tests and I showed you I had run many.  I suggest checking your knowledge of me before shooting from the hip again. 

 

Let me also add that if you want measurements for a cable, I am happy to do that.  While I am getting a bit exhausted from testing so many and finding none modify the output of the audio system, I am still here if you want to have that data.  Cables are small and light to ship so not much burden.  And I usually pay for return shipping so you are only out of pocket for the expense of sending it me.

If you were never interested in such measurements but created a topic asking for it anyway, then say so and we go about our business instead of dealing with a Kabuki theater.

@amir_asr , well you finally engaged. All you posted was your opinion of a system you never heard (mine) with a cable you never used (the Mapleshade Digital IC) and clearly have no idea or evidence to back up anything. Well, let’s go with that.

OK, so let me give you a track to run on. This is an example of a cable review by someone who tried the Mapleshade cables BEFORE coming to a conclusion. I would say my experience was more similar to 3 people that came to the same conclusions in this article:

https://positive-feedback.com/Issue3/mapleshade.htm

@amir_asr ,

You made a BIG mistake, when you didn’t align your system within your room. DSP is limited in what it can do. I think you can rectify your mistake if you work on your room (which is why you won’t post pics and FR if I am not mistaken). You may not agree with @fleschler on everything but the guy gets props for knowing how to build a room. Maybe you can start a build thread for a new listening room/studio?

Those expensive Revel speakers you own are going to waste I am afraid. You are worried about my wasting $250 and hear you are shredding dollar bills every time you listen without your room tuned, a mistake for an average listener but a disaster for a reviewer.

My info is based on the disdain you posted for room treatments in your review of the Paradigm PW Link. If you updated your room we would all like to see pics. Thanks