Hi, i have a Sony aftermarket HU and a Alpine amp prior to this i had a Pioneer HU and a Pioneer amp, all equipment was brand new..
Having everything set up i was getting a lot of noise coming from channel B on the amp on both set ups ,Sony and Pioneer ..basically only happening when i plug in RCA to channel B .
Having only channel A running all was fine but as soon as you plug in the B channel RCA i get the noise ..I have separate power from the RCA and speakers down different sides of the car ,also changed and tried different RCA cables ,also tried moving ground from factory ground to making my own in wheel well, still the same..I have tried running a ground from HU direct to a factory ground that didn't work ...This morning i plugged my phone via a 3.5 jack to two RCA and plugged in to B channel on the amp started engine and i don't get any noise ,would this tell me it's the HU or amp ,just getting confused with it all now ..
PS The noise i get is a humm through speakers when idling also if i use indicator noise is prominent also when i hit the brake i can hear a noise through speaker ,this led me to think it could be electrical so i tried a power in line filter ,one wire to ignition, one to constant 12v and earth not solved still the same ..If anyone can add anything to how or knows anything else i could try it would be appreciated .Thanks
Having everything set up i was getting a lot of noise coming from channel B on the amp on both set ups ,Sony and Pioneer ..basically only happening when i plug in RCA to channel B .
Having only channel A running all was fine but as soon as you plug in the B channel RCA i get the noise ..I have separate power from the RCA and speakers down different sides of the car ,also changed and tried different RCA cables ,also tried moving ground from factory ground to making my own in wheel well, still the same..I have tried running a ground from HU direct to a factory ground that didn't work ...This morning i plugged my phone via a 3.5 jack to two RCA and plugged in to B channel on the amp started engine and i don't get any noise ,would this tell me it's the HU or amp ,just getting confused with it all now ..
PS The noise i get is a humm through speakers when idling also if i use indicator noise is prominent also when i hit the brake i can hear a noise through speaker ,this led me to think it could be electrical so i tried a power in line filter ,one wire to ignition, one to constant 12v and earth not solved still the same ..If anyone can add anything to how or knows anything else i could try it would be appreciated .Thanks