My fronts are Klipsch Synergy F3's. When I listen to 2 channel stereo, the bass is not as good as the speaker is capable of producing. The reason I say this is that I hooked up the speaker to Yamaha 5280 receiver and there was a lot of bass. I mean it was enough so that I don't have to turn on my sub. When connected to 5790, I can hear the really low bass but not the high bass or bass like punch in your face. Please tell me I'm doing something wrong because I can not figure what the hell is causing this. I have fiddled around with all settings I could think of. The tone control on the reciever doesn't really help. I do have Zone 2 and Zone 3 lights on but that shouldn't really matter since I am not running any speakers in those zones. How many watts is this receiver actually putting out? and is it less than what the 5280 puts out? If thats the case, yamaha just screwed me over $800 receiver. Thanks for the responses.