I have a simple 5.1 surround system and my sub isn't operating properly. If I connect it directly to my Denon AVR-2105 receiver with a single regular RCA cable, I get proper operation. However, my preferred setup has a line running through the wall from the receiver to the preferred sub location. I've checked continuity and polarity betwen the connectors at both ends of the wall line. If I connect the sub through the wall connection, I get no bass from the sub. Is there an impedance problem here?

The sub is a Cambridge Soundworks BassCube 12S. I'm using the right (mono) Line Level input. Low pass freq is set to about 160Hz and the phase is 0 degrees.

The receiver is a Denon AVR-2105, the subwoofer mode is LFE normal. Crossover freq is set to 80Hz and Auto Surround Mode is on.

Any help diagnosing this problem is greatly appreciated.

Thanks,
Jerry

Hmmm.....................

What is your in-wall cable, exactly? If your sub works fine when connected with a standard RCA cable, then I would say your problem is not your sub.