TH-M505. saw this link from the pechorins website. I sure would appreciate any help you have to offer. I fully believe that i have the entire system set up correctly, all the speakers work perfectly and sound great except the sub will not produce sound. this is a model with the amp built into the back of the sub so it is receiving both power and signal from the DVD unit and the power cord. it might be part of the problem or an indication of something but, the cooling fan does not seem to kick on. again, thank you for any information you may be able to offer. Toby

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