I have switched up my sony amps. I'm now running JL Audio HD Series - HD600/4 amp on my front speakers RMS power is 150 watts x4. I'm also running a JL Audio Slash series 1000watt RMS to my subs JL 10001V2. So I'm not worried about underpowering my system. These amps have the power. ( Checking out the Morel right now they look nice as well.) I never even considered Hertz. I could probably go down to Andre's and check them out today!