I have a 2007 Pontiac Vibe and bought a touch screen head unit. I believe the car has Moon and tunes. I have a sunroof, tweeters by mirrors, and a subwoofer in the back. Unfortunately when I try to adjust the amplification lower in the head unit it has no effect. At the lowest volume setting the radio is way too loud.
When I ordered this head unit I thought it had 4 channel preamp lineouts. Unfortunately it only has two channel line outs and two channel line in.
I went ahead and just wired the speaker wires from the head unit right to the speaker wires in the harness adapter. So I guess I am sending an amplified signal to the amplifier under the seat.
Is my best bet to eliminate the amplifier and make a harness under the seat that just feeds the signals straight through? Is there a way I can use the preamp lines and still have four discreet channels? Can I just somehow wire in resistors to bring my volume down, because I can't turn it anywhere near 100%.
If I return this head unit and get one that does have for lineouts but they are still 4-volt am I still going to be in the same boat?
Any and all advice is greatly appreciated!