Hello all, i am fairly new to the audiophile world (all the way from Canada), I have learned a great deal about bass management and a good overall system thanks to Gene and Hugo's youtube videos. So my question is this I am running the Yamaha rxv1081, Polk TSX250C center, Polk RtI A9,s for fronts, RTI A1,s for surrounds and RTI A3 for rear surrounds and TSX210 B for heights, i alternate the heights for rears whenever the case arises i cant run both. And three 12" Polk PSW505 subwoofers 2 in the front and one at the rear. I have the Emotiva Bas x700 (7 channel) 80 watts RMS all channels driven, The surrounds and heights are the only speaker connections to the amp, the rest are running off the Emotiva, The Polk A9,s are biamped to give me 160 W to each. the rear surrounds and the center take up the other 3 channels on the Emotiva. I want to purchase another power amp to run the A9s and have all speakers run off a power amp(s). so finally my question, do you guys recommend any amps to run the A9s, im looking at the Bax x 300, 150 watts RMS per channel, its a 2 channel amp, and running the rest of speakers off the A700, OR, do need (2) basx300 one for each speaker, trying to save some money but dont want to be cheap. The reason i am wondering is, I implement bass management, ALL speakers set to small, do I really need all that power for the A9s, since the speakers are set to small? Is 150 watts 2 channel enough or 2 bas x's amps (one amp for each speaker) and have 300 watts to each A9. Also If i buy one amp Basx300, can i run 150 watts to the bottom half of each RTI A9 and run 80 watts from the 7 Channel Emotiva amp to the tops of A9s, biapmed of course, is this and option. i understand the A9s are like 2 different speakers when biamped Please some guidance in helping me make a sound upgrade to my power,