Hey everyone I just installed a 4 channel performance technique amp in my xb and only the front speakers have the engine noise through the speakers I think it needs a flterz? Or any one have suggestions of what it could be? And also I can't get one channel to work? I had this amp previisly in my integra so I know it works and also I used a LOC its the PAC2, any one have suggestions or anything please im open to suggestions

Check your wiring then check it again.

x2^^^

make sure you have a good solid ground too. bare metal to bare metal

yea i got feedback ever since i installed amps in my car as well for the interior speakers. i cant figure out what it is, but ive heard that pioneer headunits are the worst with that for some reason, but everyone says make sure you have good grounds all over. and some say to ground the head unit itself even tho it gets grounded when you put the 4 bolts in to hold the radio in the car, who knows. i cant figure it out, and can only hear it when the radio is off or really low, so i just crank it up!!!