Originally Posted by SoNic67
Their theory say that the amp sounding LOUDER will be perceived as sounding better.
My case is that a really better amp will sound better even if the volume is lower than the other. 3dB volume error will not influence the perception. Those ear hearing curves are basically parallel at those differences. 20-40dB sure, maybe will affect ear bandwidth...
That's more in life than bandwidth linearity. Two amps can reproduce identical ONE sine wave, but when you over impose TWO (or more) sine waves (aka music), they will start to inter-modulate them. One can be better than another, and the IMD products can be clearly heard, regardless of small differences in original volume. There are other aspects that influence the final result - like power lines sagging and recovery, thermal coupling, increased THD at lower levels (<5% of max)...
But simple minds like explanations that are simple and ego-boosting. Like: 'My $100 Pioneer sounds the same like that $3000 Denon, therefore I am smart by not having a better job and money'. They will even subconscious deny they hear any differences, because that would make them feel bad about themselves.
I must say, SoNic67 has a point there. Indeed, I start hearing those differences at -60. So, your subtle volume difference has nothing to do with them. I understand that are a figment of my sick imagination and there is an excellent study (thank you diomania for providing the link, BTW) to prove that point. I cannot possibly doubt the methodology of that Stereo Review double blind and triple secret ironclad unbiased test. Nor I want to.
My day to day work is high technology. I read a ton of highly technical presentations and side-by-side performance tests. The tests absolutely and unequivocally prove (don't postulate, mind you, prove!) that the presenter's product is the best there is. There are hundreds of them. All the best there is. Do I doubt the methodology of those tests? Not really. You see, even if a product performs well in some artificially created test environment, it does not mean it will perform equally well in my company's data center with our customers (even ALL our customers equally well or poorly). We take the product and test it for months or years before we actually buy it. Our data center is full of super-servers provided gratis by manufacturers and even software companies to lure us in and lock into a contract. If I signed up for a product (I don't have such an authority, BTW, just as an argument) only because there was a an ironclad unbiased test without proving that it serves our needs in eight different respects at least two years in the future, I would be fired the next day (and rightfully so).
I am not saying you are selling me or anybody else anything by any means. What you extend is an offer of knowledge and experience, which is a gold mine. I am immensely appreciative of that. They say that help offered without any expectations of a payback and even with a chance of being scolded for it is the most pure help. All of that is true. You had as much of a secret agenda when you pointed out that power amps do not contribute as the other guys on this very site that said power amp is the way to go. There isn't any agenda.
Here is the thing, though. I don't live in a test. This is real life. When I listen to music there isnt any additional equipment for me to compare to. There aren't any blind studies. There aren't any toggle switches between different products. There aren't 388 different different perceptions, just one and it happens to be mine. There isn't even an option to go back to my previous setup without re-connecting/recabling, which will take a good hour. I have done that in any case and still prefer the power amp version. There are just my speakers and me. My perception (however biased or hallucinogenic) is what I hear and experience. Everything else is something I've read and know to be true, but not more than that.
As my boss tells a sales rep in a sales presentation: "We don't buy unbiased studies. We buy what works".Edited by grigorianvlad - 10/8/13 at 11:17am