Hum / whining noise through speakers.

[e30 gangsta]

Hey guys I just recently finished my audio install in my e30. Today I noticed though that I am having a small bit of a/c hum/ whining noise coming through my speakers. Its a bit louder when the air conditioning is on. I have everything grounded and it sounded great but now Id like to eliminate that noise as its very annoying.

Could the stock ground wire that I crimped on the back head unit for ground be bad? Do you guys usually make a better ground for the head unit? Any options to fix this issue would be greatly appreciated.

Thank you.

[bmwman91]

The ground may be fine. How are signals routed (how are you getting signals from the HU to the amp in the trunk)?

[e30 gangsta]

I have the rca's running through the center console to the rear. And the speaker wires running along both doors to the 4 channel amp. Hopefully some pics will help?

[bmwman91]

Does the whine change tone with engine speed?

[e30 gangsta]

Yes, when I rev my engine it gets louder and a higher pitch.

[StereoInstaller1]

What gear do you have?

[nates 87 325is]

try grounding the rca cables to the metal casing on the head unit with some thin wire i had the same thing with mine i think its the alternator but after i ground the cables it was gone

[StereoInstaller1]

try grounding the rca cables to the metal casing on the head unit with some thin wire i had the same thing with mine i think its the alternator but after i ground the cables it was gone

This is an ooooold installer trick. If it works, it also means your deck is bad.

[down_shift13]

check your RCA cables. I had the same problem on mine. Turned out to be bad RCA's. Also how much gain do you have on your amps right now? you could be amplifying the noise too.

[e30 gangsta]

rca are fairly new monsters. The head unit is brand new. Ill check the gain and report back. Luke 4.10 auto.

[StereoInstaller1]

I meant AUDIO gear

[e30 gangsta]

Sorry Luke I misunderstood.

Alpine mrv f353 as my 4 channel, and jl amp for my subs that is bridged. ( I will get the model number later ) Two kicker comp vr's ( dual voice coil. All monster speaker cable, remote and rca's. And the new pioneer deh-6300ub as my head unit. Ill snap some pictures today of my setup.

[lwde30]

bump for update cause im having the same problem

[dannyyisntt]

Sounds like your car is haunted. Does the whining sound German? If it tells you to invade Poland, don't do it.