noise noise noise
zerosk8er
Posts: 36
sorry if this has already been asked but i did a search and did not find what i was looking for.
so i have a Rockford Fosgate p200.2 amp (bridged) and a cheap 10" thump sub.
my car is old but works really well and has relatively low mileage, its a 1992 Subaru legacy but the alternator is almost brand new and the battery is probably about 3 years old.
i have a pioneer deh-p5800mp
i have the rca wires (far from top of the line but not the cheapest possible) on the right side of the car and the power wire (8 gauge) is on the left side.
the amp is grounded with 8 gauge wire to bare metal on the floor of the trunk is this a bad spot since the metal isn't that thick?
i had an amazingly awful whining sound that went up with rpm's which is what convinced me to change the rca's to the opposite side on the car. it seemed to be gone... but wasn't
lately when i pause my cd i wont hear anything then i'll go over a bump and my sub will thump as if it was getting signal and then the whining which increases with engine rpm will come back then i will hit another bump and the whining will go away again.
this happens intermittently almost as if it just feels like doing it.
my head unit is grounded using the wiring harness, some people have told me to ground it to the same spot as the amp. should i bother?
i have not checked the alternator wires since they are hidden and would require removing a lot of components to get to. the battery grounds looked dirty so i loosened them and moved them around just in case they weren't contacting properly.
i have troubleshooted it a lot: when i unplug the antenna nothing changes when i unplug the rca cords from the amp its gone and if i unplug them from the head unit the noise is also gone. this led me to think it was coming from the power wires of the head unit so i installed a couple of noise filters, they didn't change a thing.
i have spent way too much time on this without success so please tell me what to do!
thanks a lot
-Alex
so i have a Rockford Fosgate p200.2 amp (bridged) and a cheap 10" thump sub.
my car is old but works really well and has relatively low mileage, its a 1992 Subaru legacy but the alternator is almost brand new and the battery is probably about 3 years old.
i have a pioneer deh-p5800mp
i have the rca wires (far from top of the line but not the cheapest possible) on the right side of the car and the power wire (8 gauge) is on the left side.
the amp is grounded with 8 gauge wire to bare metal on the floor of the trunk is this a bad spot since the metal isn't that thick?
i had an amazingly awful whining sound that went up with rpm's which is what convinced me to change the rca's to the opposite side on the car. it seemed to be gone... but wasn't
lately when i pause my cd i wont hear anything then i'll go over a bump and my sub will thump as if it was getting signal and then the whining which increases with engine rpm will come back then i will hit another bump and the whining will go away again.
this happens intermittently almost as if it just feels like doing it.
my head unit is grounded using the wiring harness, some people have told me to ground it to the same spot as the amp. should i bother?
i have not checked the alternator wires since they are hidden and would require removing a lot of components to get to. the battery grounds looked dirty so i loosened them and moved them around just in case they weren't contacting properly.
i have troubleshooted it a lot: when i unplug the antenna nothing changes when i unplug the rca cords from the amp its gone and if i unplug them from the head unit the noise is also gone. this led me to think it was coming from the power wires of the head unit so i installed a couple of noise filters, they didn't change a thing.
i have spent way too much time on this without success so please tell me what to do!
thanks a lot
-Alex
LIVE LOUD, ROCK HARD!!!
-Chronix Aggression
-Chronix Aggression
Post edited by zerosk8er on
Comments
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Since the noise changed with the RCA's my first thought would be that they are the culprit. Are they shielded? If so then I would be willing to be thats the problem.polkaudio sound quality competitor since 2005
MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st
polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
