Looking for some guidance. My son has a 1998 Intrepid he just purchased an aftermarket head unit, which had 60 watts per channel. After connecting this unit up with the conversion wiring kit I’m getting no sound from the speakers. I went back re-check all the wires. I have power to the unit and this unit has spectrum lights to follow the music sound, which is lighting up with the music but again no sound from the speakers. Does this have something to due with using the stock speakers? Is there an amp that needs to be disconnected? Could this unit just be bad? Any help is appreciated. The stock system is the 120 watt 8 speaker system. No infinity system.