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In Reply to: RE: Has anyone else tried this experiment? posted by vinnie2 on July 10, 2017 at 04:25:07
Vinnie, I don't want to put words into 91derlust's mouth, but I think I agree with what he's saying.
Here's how I perceived it. I have build several well-engineered but very diverse amps, all safely within design centers, i.e., conservatively aimed at the most linear operating points. I recently listened to three of them in comparison as you have, and I can understand your take-away that they sound the same. In my case, one of the three had just slightly looser bass -- and it happened to be the one with the cheapest OPTs. The other two, a PP and a SE beam tube in triode mode, were sonically identical all the way to the deepest bass. I listened to treble, mid and bass, over and over, and after many recordings could not point out any differences with those two amps.
That said, one amp (the SE beam tube in triode) consistently engages me and has my toes tapping, where the other just doesn't. But the PP is my go-to amp offering hours of listenability just like the other. As 91derlust implies, there is "something" about that SE amp that physiologically affects me and draws out my inner rhythm, whereas the PP other doesn't. (FYI, I'm actually partial to PP amps.)
Some day, I'll scope them out to match power output and compare the square waves and sine waves. My guess is that I will see some difference that comparative listening isn't picking up. That may give a clue to an unheard difference that set my toes to tappin'.
Follow Ups:
Careful now, you are starting to sound like my first post and you are subject to being stoned at any moment. Your first paragraph is what I have been saying all along.
I am not sure I agree with the second paragraph or not at this point. I used to think I did. I will have to do a lot more listening to be able to answer that one now.
The part that is pissing me off is so many people saying "oh no, the amps have to sound different". The fact is they don't have to, and there is a lot of evidence around if one bothers to look that says they don't. If there is some subliminal effect at work here that makes us like one type of amp better than another might explain a lot, but then it also would open up a lot of other questions as to why it does. As a closing thought, did you play the same music on both amps? That might have something to do with it too.
PS Hope you can make that sooner rather than later on scoping them out for differences. I would be curious to hear what you find out.
Edits: 07/10/17 07/10/17 07/10/17
This is a sentence from your OP. After all you've written here, I am not now certain whether you want to insist that they DO sound the same when operated within their respective limits (an assertion) or to ask WHY they sound the same to you in your test system (a question).
Most responders are suggesting reasons WHY the two amplifiers may sound the same based on the manner in which you have set up your comparison. I don't sense any personal animus going from us to you.
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