If your Onkyo has a set of pre outs for front right and left you can run those out to a separate amp, basically bypasses the internal amp. I did this on an older model Onkyo before HDMI.I am not sure if this will affect how the speakers work with the surround processor though. It definitely improved the sound of the speakers in my setup.
New here ...need some opinions
I have a onkyo 705 and i think i over bought on speakers.I bought a pair of Klipsch KlF-30's for my fronts.I have them in my HT system now but they over power my other Klipsch SF-2sides KlF-C7 center And SS-5 backs and a Velodyne va1250x sub.I have an older Yamaha rxv640 laying around and was wondering if it would be a good idea to hook up an amp to that reciever and use the klf 30's for 2 ch stereo.IF so money is kinda tight.I have about 800.00 bucks at the moment if i get an amp what would be a good one for those speakers.Any help or opionions would help.Like i said i am new to this i dont know a whole lot about this stuff