Hello - I've been interested in an amplilfier to mate with my Harman Kardon AVR 7000. I sent in a question to tech support at Harman asking about the Signature 2.1 -- I mentioned that I had always heard that more amplification would provide better sound. However, in this case, since the AVR 7000 and the Signature 2.1 are both rated at 100x5 WPC, I was doubtful that there would be a performance gain. He pointed out that the 2.1 had 100 amps, while the AVR had 75 amps. Even though they both have 100 watts.