engine noise?

Question

technicians and extreme audio enthusiasts only need answer. i have engine noise only coming out of one speaker no one knows why. i have taken it to two different shops and neither could really give me any answers. i have went through it all connections are good all hardware works fine. its out of the passenger side 5 1/4 tweeter. here is my setup to help. its in an 05 mustang gt alpine dvd head unit mtx 1501 and 4504(maybe wrong number)amps mtx 9500 sub 2 sets of kicker 5 1/4 components one front one rear and 6 1/2 kicker components in factory sub location. any ideas will be greatly appreciated. my last idea of re-re-retuning(on its 3rd tune) the car helped alot but still get real bad high pitch noise that goes higher with the rpm about a quarter of the time. thanks.

Answer 1

You need to go step by step and figure out where the problem originates. Start by switching the speaker wires so that a different amplifier channel is connected to your problem speaker, and the original channel is connected to a different speaker. If the problem stays with the first speaker, you'll know to check the speaker, crossover and speaker wire. If it moves to another speaker, then your speaker and wiring is fine and you need to move on to the amplifier and inputs.

Try reversing the RCA's on the amp inputs that run the 5 1/4" speakers. Again, if the noise changes speakers, then you know your problem is in the RCA cables or the upstream component; try substituting different RCA cables. If it stays in the original amp channel, then the problem is in the amplifier; maybe a bad RCA plug or other internal problem.

Just be patient and take it a step at a time until you've ruled out everything but the source of the problem. Don't try to fix it before you've isolated it, or you'll just end up frustrated.

Answer 2

it can be a bad channel on the amplifiers pre-amp
also the wires going to that speaker maybe touching ground or a screw cut part of the speaker wires going to the door

the door speaker is touching ground or the speaker coil is bad ,not blown but making contact with the magnet

take a test light or meter set it to volts one terminal to positive

remote all the speaker wires from the amplifier and touche with the test light or meter every speaker wire if you find ground that can be the problem

also open and close the door hard a couple of times
i hope is one of this good luck

Answer 3

Rerout your wire to that speaker,It's picking up noise from somewhere.It could be a PWM driver [which converts analog to digital] causing your problem.