Originally Posted by Sinitro
Suggest U open the unit and double check where each wire goes...
1 wire is to 12V+
1 wire is ground & speaker ground
1 wire is left speaker +
1 wire is right speaker +

By following each wire internally will disclose its function, most crucial is the 12V+ and ground, the speaker +'s are easily reversed ..

Just my $0.02... wink


You never want to get the speaker wires "out of phase" or the + positive to the +positive on one speaker and the + positive to the - negative on the other speaker as you will have poor sound quality. When you do this one speaker will cancel out the other as one is "pushing" air and the other is "pulling" air (for lack of a better term). You will have little or less base. It's best to wire the speaker in phase or correct, positive to positive and negative to negative.