Housedoc, I have a 7.1 system and use my two 2200s to power my left and right mains--so they are center stage in my system (and if I had to do it again I would buy nine 2200s, one for each channel throughout my system so that I could easily replace an amplifier channel if one fails). In any event, my 7700 powers my center, 4 surrounds, and stereo zone 2. My two NHT U2 subwoofers are driven by two NHT A1 amplifiers (the NHT subwoofers and amplifiers were a matched system along with an X1 crossover), the internal compenents of which look like they were designed and manufactured by the same company--I am sure that Gonk or another outlaw can confirm.