thanks ricky but the only issue i am having is i already have my aftermarket dvdgps dashboard unit purchased and it gives me NO SOUND when i connected to desparately either i am looking to replace with aftermarket 5 amp or temporrary i can connect 4 pair of door spekaers directly from the rear of my aftermarket unit to the speakers wire on big output 15 pin amplifier plug but i dont know the pin number and particular color for 4 door main speakers. that way i would simply bypass DSP amplifier and i would use built-in DSP amplifier of aftermarket unit. can you help me with big dsp amp 15 pin plug description pls
thank you so much ricky again