Well thanks again to all you guys and esp AVRat, I got my sons new speakers all hooked up over the weekend, and all I can say is WOW. He went with Ascend Sierra-1 for the front 3 and the CBM-170's for the rear. and a Epik sub. I am really impressed with these speakers. I am letting the amp do the crossover. I almost think he could have gotten away without a sub. The sierras range is 39Hz - 22kHz ± 3dB. I used the mic on the Pioneer amp to automatically set all the speakers, and it sets all the speakers as large, so very little goes to the sub. On any of the movies that we tried that might have deep bass I really could not hear the sub. I manually set the speakers to small and then I could hear the sub. But I think it sounds better on large. I am not sure if the sub will only play anything below 39Hz now? The Epik did not come with any owners manual so I am not quite sure what I am doing, I did turn the sub crossover toggle off. So I will continue to play around with different settings. Thanks again. Mike