Ok, I'll be honest. I bought a Polk RMDS-3 system on Ebay. The ad said that the speakers and the preamp appeared new, but they were missing the cables and the remote. When I got the system, both the pre-amp and the subwoofer powered up. To hook the pre-amp to the subwoofer, I ordered a DB25 cable from Polk. After hooking the system up, there was no sound from the subwoofer or the other speakers connected to the pre-amp by the DB25 cable. It didn't matter whether I tried to get sound from the tuner, dvd, aux, etc. The red light on the woofer never turned green, nor did I get any sound at all from any of the speakers. Is there a simple solution, or did I buy a reject? I've tried the multi option with another amp and it works.