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

@holmz

I felt there is no other way for you to get the info you were requesting about gear.

The measurements of the gear are different than the measurements of how the gear behaves in a room right?

I advocate getting the room right first and yes, in room measurements can indeed make the trial and error process a bit faster (and maybe even less expensive).

Now, to answer your question to the OP of how to separate the real deal from a fable I can’t tell you a single measurement that will get you 100% guaranteed satisfaction that your money was a good investment. If you know a better way than auditioning it in your own room I am open to trying it.

I would not recommend just taking some expensive speakers that measure well and sticking them in a room with bare walls like some of our scientifically minded guests. For casual listening, fine. For critical listening and professional reviews maybe get some feedback from a knowledgeable third party like Anthony Grimani at www.sonitususa.com or Jeff Hedback at www.hdacosutics.net.

@laoman 

You still have not answered if you actually ever check whether Yang sends you off the shelf products or cherry picked ones. This is now the fourth time I have put this to you. Scared?

Fourth time?  I have only seen it now.  First, no, John doesn't send me anything.  He is an engineer there.  I have had a contact there way before John worked there that sends me equipment.

Every Topping product comes with audio measurements -- what OP was asking about.  They were doing this before I started measuring gear.  It is not a surprise then that their gear measures well.  They optimize and verify their designs as part of their own engineering process -- what every audio company should be doing.

As to your allegations, when this came up a couple of years ago, my contact there offered that I go and buy everything I have tested from them at their expense to verify that no golden sample is picked.  I consider Topping very ethical and accept their word that the speak the truth here.

If you have any evidence to the contrary, put it forward.  Otherwise, the allegations are uncalled for.  And at any rate, would apply to every reviewer out there getting company samples which means 100% of the gear sites like Stereophile, Soundstage, joe reviewer, etc. tests.  Have you voiced objections about them in the same manner?

Keep in mind that these are not mechanical product subject to large variations.  Yes, there can be minor differences in performance of components but nothing significant can be achieved.

Finally, members from time to time send me samples they have purchased to remeasure and compare against company supplied ones.  So far, none have produced different results to indicate any gold samples are picked.

I suggest if you are going to call a company's conduct into question, that you work on some evidence to back it.  They surely deserve not having their reputation soiled just because you felt like it.

@coralkong 

I was done with ASR a while ago, and you haven't changed my opinion.

No worries. I am only responding to what people write about me/ASR.  Stop doing that and I won't interact with you.  

@fleschler 

"As to tweaks, I say try it and if you like the sound results, keep it. "

Excellent advice.  I would just make sure you only use your ears in such an evaluation.  They are trivial to test this way because they don't change any linear aspects of the device (levels, frequency response, etc.).  Have a loved one add or not add the tweak 10 times and see if you can tell the difference 8 out of 10 times.  Take all the time you need.  Let your ears and only your ears be the judge and not fall for statistical error.

If you do pass such a test, repeat with capturing a video of it and we have something wonderful to discuss!  If you can't do that, then measurements, null tests, engineering analysis of what is going on, etc. are great help in getting to truth of the matter.

@amir_asr

If you do pass such a test, repeat with capturing a video of it and we have something wonderful to discuss! If you can’t do that, then measurements, null tests, engineering analysis of what is going on, etc. are great help in getting to truth of the matter.

Don’t just show up here and start telling everyone what to do when you don’t lead by example. You have not posted your own system, pics and measurements in the virtual system page, as you say, "we will have something wonderful to discuss"
You are all about what the OP should do, let’s go and show him what you got, you gonna walk or talk? I promise to make no disparaging remarks, just try to be helpful, please do same.