I recently purchased my the Klipsch Synergy Six system and decided to upgrade the surrounds to the SS1s and the sub to the ksw 12. I am running a Denon AVR 1802 and have the ksw 12 hooked up to the preouts with RCA cables. When I play music and crank up the bass on the receiver and the sub, I'm disappointed because it doesnt even come close to my old Promedia v2-400s. Any suggestions?