Hi , I have a Polk 450 subwoofer.(Approx 3months old) All the sudden it doesn't have anything coming out of it.I haven't touched any of the connections & I haven't played it loudly so I dont think it could be blown.It's been working fine. The connections are still good (I did use monster subwoofer cable) The units haven't moved. I checked the back and the power light is on. Could the problem only be with the sub or could it be the receiver?(Technics SA-DX 1050 ...Also 3 months old)I also checked the connections in the back of the receiver Everything worked perfectly and all the sudden ..no sound from sub. Help!!!! I m having people over to watch Shreik !