Concertone ZX600 Sub not working

[Dwight]

I have Silverback 31LRLRS. Concertone ZX600 Stereo. Nothing souded like it should, so one rainy day I took the unit out so that I could look at the wiring on the back. None of the speakers were wired in correctly. I corrected all of these connections. Sound was much better, but still nothing from the sub. Had another rainy day recently. Pulled the unit out again. Checked wires going to Sub. There are two pairs of wires going to sub. I discovered that I had two + wires going to one pair, two - wires going to the other. Corrected the wires. This unit now sounds really good. I really think that I'll keep it.

[cat1956]

Great! nothing like a good old fix it yourself project.

[KyDan]

It's a real shame they do such a crap job of hooking them up at the
factory. Really makes you wonder about anything electrical in the
trailer, especially the 120v outlets.