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Re: Aczel talked measurement, mkuller talked parts.

Pat,

Is you wish to take the moronic view that my post was " jumping in the middle of a conversation" then guess what that's all anyone does here besides the originator of the post. So to even mention it is academic and just another case of your being negative for negative's sake! But then again that's your typical mode of operation. So what else should I expect? I'm going to address only one part of your post. You said: What is implied by Aczel is that the performance amplifiers meeting those criteria under those conditions should be similar enough that differences would be inaudible.

My reply is the problem with Aczel's 7 prerequisites is he's implying they were are all that's needed to be fulfilled in order to make it any impossible for two amplifiers to sound different, period! As I said before the point that's most important is the fact that Aczel makes no room for exceptions to his rule. Aczel never declares if the amplifiers use completely different circuits, or different parts, at very different costs and or measure completely differently in every other parameter, that makes them excempt. What Peter does is he declares It is impossible for two amplifiers to sound different... if and when these 7 requirements are met:

1) The levels are matched
2) Each has high input impedance
3) Each has a low output impedance
4) Each has a flat frequency response
5) Each has low distortion
6) Each has a low noise floor
7) Each is not clipped

Your lame excuse that one person is talking parts and the other is talking measurements is an attempt to try and obscure the topic. As I asked you before what do you think Aczel's measuring besides the performance of the circuit topology and the type and quality of parts used? What's providing the high input impedance, low output impedance, flat frequency response, low distortion and low noise floor is in fact circuit topology and individual components used!

If you don't believe that's true Pat then simply remove the circuit topology and the type and quality of parts used and take another Aczel inspired measurement of the high input impedance, low output impedance, flat frequency response, low distortion and low noise floor! What's that Pat? There's nothing to measure now? Guess what was providing the measurements you took?

So I'll end with this: "it is up to those who believe the circuit topology and type and quality of parts used CANNOT sound different to establish that they don't sound different. Get back to me when you do that . . ." Oh yeah that's right it's impossible to prove what you believe, isn't it? How convenient for you! So now you want those of us who disagree with your POV to do your work for you? Sorry but I/we have better things to do than disprove your beliefs...

Thetubeguy1954

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