i know this is prob on here somewhere but carnt find it for **** lol.
just bought a new headunit to replaced the bose head-unit, got the wiring harness with it so it all just plugged in only 2 wires was blue/white (amp turn on) connected that up and a black/white ( amp ground) i grounded that powered it all up and all works but sound is soooo quiet on full blast can barely hear it?
what could be wrong???

 

did you turn the gain up on the amp?

 

no not touched the amp dint think should have to with only swapping the head unit

 

Look up the preout voltage specs for the radio you bought... I bet its 2v.... Need at least a 4v for it to get the right input signal strength for the stock Bose amp....

 

What radio?

What harness?