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rOB "You may find yourself with the world cheapest functioning sub..." That's what I'm hoping :) I found the preamp inputs, but the problem is, Polk also sends a turn on signal through the db25 cable. I figured out that the signal is 24V, but when I rigged it, I hear the relay click once...

Frank, thanks for checking it out. It's a 25 pin connector. Polk receiver sends it a proprietary turn on signal.

Hi all. I was able to buy a powered sub really cheap from a store going out of business. The sub is one part of the Polk RMDS1 system. According to the sales person, this sub will only work with Polk system. But for $25.00, I thought I'll take the risk. The amp for the system(5 channels +...