I experience distortion at decently loud audio on them when I power them through a subwoofer. Basically, I have a mini subwoofer that has an onboard amp built in for powering other speakers. I've realized that amp will not suffice for these tower speakers, because upon turning up the volume they distort. When I plug the speakers straight in to the receiver though, they go much louder with no distortion so I know its not the speakers. I see that amp is 300Watts at 4ohms. Is it okay if my speakers are 8ohms? Thanks for all of the explanations.