Aftermarket headunit No Sound - Help!

[wullaby]

@OP, your aftermarket head unit can only power 4 speakers, if you have DSP most likely you have 8 speakers + the 2 6.5" subs on the rear passenger compartment. I kept the factory speakers in, used an Alpine 4x100W amp to power all 8 speakers. I did NOT run speaker wires to each speaker, instead the DSP AMP in the back has speaker wires all there, you can splice into there and run to your amp literally with less than 3 ft of speaker wire to tap into your aftermarket Amp which can be mounted directly in place of the DSP AMP or above it if you find a small enough amp like me. You only then need to run a set of RCA's up to the aftermarket HU or 2 sets if you wish to fade. I ran one and used a splitter at the AMP. I bypassed my DSP amp alltogether since it died due to water intrusion.