I have been using three Cheetahs on my front three channels from my amp. to my A/V control center ( Proceed amp. , macintosh 134 A/V control center) . I was using A.Q. vipers and the cheetahs are much more responcive , hard to put into words , faster ,alot warmer in voice and base, mids a little bit crisper.I am using B&W 802's with A.Q. granite biwired . Saving up to buy 3 more Cheetahs from A/V to DVD player. thanks Bill Head