In reply to:

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Can you really hear the difference between a tube amp and a transistor amp?

I have had people tell me that the tube amps are "warmer" sounding, but frankly I've never been able to hear it. If I want a warmer sound, I'll just bring up my 50-1000 Hz range a little bit with the EQ, and back off a bit anything over 5000 Hz.

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Perhaps the warmth comes from cathode heaters glow shining through the window, obviously the most important part of the design...

Now, I do seem to remember some kind of explanation featuring tubes producing odd parasite harmonics, and transistors even (or vice versa), and human auditory system (probably brain more than ear itself) more sensitive to one than other.... or something like that. To me, this almost goes into the same cathegory as one-way speaker cables and vibration-insulated digital components, but again, being experimental physicist by training, I am willing to accept the results of a well-designed experiment...

Cheers!

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green