Originally Posted by clrv
I do AB test all day long with people. Please do not confuse people with this statement as I am sure you have not done a true AB comparison. There is a difference in amps. To really hear the difference you need a good source and good speakers. If you are ever in my area dftkell come and see me and I will let you listen for yourself.
Here's a quote from the Audiocritic.com in an amplifier review:
"I repeat, for the nth time, that all amplifiers having high input impedance, low output impedance, flat frequency response, low distortion, and low noise floor sound exactly the same when operated at matched levels and not clipped. (Those who are unable to stomach this simple truth, proved over and over again in double-blind listening tests, should stick with Stereophile.)"
One of the keys to doing an A/B test is that the levels have to be matched. If they are not matched...even one is even slightly off...they will sound different because one is louder. Most A/B tests aren't properly done.
I'm not trying to confuse people. I was actually agreeing with a previous poster in this thread.
If an an amplifier has high input impedance, low output impedance, flat frequency response, low distortion, and low noise floor sound it should have no sound of it's own.
Practically every modern, well-engineered amplifier meets these requirements.
You should check out this article amoung other articles/reviews on the site:http://theaudiocritic.com/blog/index...Id=36&blogId=1