I made a lot of mistake on my first attempt on the subject line so I can understand why I haven't got any answers so far, so here is is again: My system consist of a Kenwood VR-410 system with a 5 speakers suround kit from kenwood. with that kenwood kit come a 8' passive subwoofer. so I've decided to use my old Pionner stereo amp 100WX2(200W thru mono?) to power the sub Everything is fine now and I am quite pleased with my setup but now I am wondering if I plugged everything the right way for the sub and amp?? here is how it is setup : I got a RCA cable going out of my Kenwood receiver through the sub preout plugged into the stereo Pionner receiver using a splitter to go on left and right input of the line in(CD actually) now I got a pair of 12g speaker cable running from both left and right channel into the left and right input of the passive sub(got input for left and right speakers pair so I thoughtit might be better) Now, I put the sound level of the stereo amp at about 50% and I left the sub Out level of my kenwood receiver to 0db it's not bad I got pretty solid low deep bass, but could it be better? I ma not an expert in amp so I suppose that if I plug it in mono(not splitting my RCA cable and only running one 12g speaker wire to the left or right input of the sub) I will not used the 200W that my stereo amp can give me. is this right or do the 200W can got thru only a mono signal? also, should I crank up the sound level of my sub to 100% and lower my receiver setting to someting like -5 to -10db?(like they recomend on the SVS website, and I know I don't have a SVS CS sub so It might be irelevant) or should I leave it like it is now(50% and 0 db? to much possible tweeking for my poor soul! please help me!