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-   -   Sound cutting out? (http://forum.e46fanatics.com/showthread.php?t=665853)

TiAg2247 04-13-2009 05:07 PM

Sound cutting out?
 
I noticed this has been happening more and more as of late. Here are my symptoms:

1) Loud humming noise all the time from the subs when key is ignition position 2, and when engine is actually running too.
2) Every couple of minutes, the sound completely cuts out for a second or two and then kick back in. This happens randomly.
3) And now, when the ignition is in either position 1 or 2, there is NO sound coming form the speakers, but the subs still produce a loud humming noise. This happens for all inputs: AM/FM/CD.

Other useful info: The installer tapped the LOC's inputs for my amp to the HK amplifier location's wring harness for both remote turn on and then signals themselves.

What's the diagnosis?

albarran9 04-13-2009 08:10 PM

sounds like your ground wire isnt properly grounded. I'd start there. if not check all of your wires in the LOC and make sure that they have a secure connection.

TiAg2247 04-14-2009 01:37 PM

The ground seems fine from what I can tell. The LOC connection seems isolated too. What gives?

TiAg2247 04-15-2009 09:04 PM

Alright, so today I had a hunch my subwoofers' amplifier might be causing some problems. I drove around the block for a couple minutes and boom, the symptoms arose again, the battery light comes on every now and then at random times. I decided to disconnect the ground wire to my aftermarket amplifier and WHA-LA! No more sound cutting out, no more flickering lights and the red Battery light on the cluster never came on once.

I also noticed something else: the power cable for the amplifier connected to the OEM battery showed severe signs of burning. The electrical tape, the terminal, the wiring itself seems to have burned out quite a bit. I reconnected the amplifier system and noticed that if I played around with the power cable, the car's lights would dim in and out and the subs would make popping noises.

I'll take a pic of my actual setup once the camera's battery is charged. In the pic below, the amplifier's power cable is connected to where the WHITE arrow is pointing at. Should it be at the GREEN arrow instead?

http://img18.imageshack.us/img18/9484/75237073.jpg

What's wrong with my setup?

BmwAudio32 04-16-2009 08:18 AM

Quote:

Originally Posted by dbworld4k (Post 9784078)
Alright, so today I had a hunch my subwoofers' amplifier might be causing some problems. I drove around the block for a couple minutes and boom, the symptoms arose again, the battery light comes on every now and then at random times. I decided to disconnect the ground wire to my aftermarket amplifier and WHA-LA! No more sound cutting out, no more flickering lights and the red Battery light on the cluster never came on once.

I also noticed something else: the power cable for the amplifier connected to the OEM battery showed severe signs of burning. The electrical tape, the terminal, the wiring itself seems to have burned out quite a bit. I reconnected the amplifier system and noticed that if I played around with the power cable, the car's lights would dim in and out and the subs would make popping noises.

I'll take a pic of my actual setup once the camera's battery is charged. In the pic below, the amplifier's power cable is connected to where the WHITE arrow is pointing at. Should it be at the GREEN arrow instead?

http://img18.imageshack.us/img18/9484/75237073.jpg

What's wrong with my setup?

Hmm, it looks like you have a sufficient gauge wire but i'm not sure. What sort of fuse setup are you running, and what gauge wire? How many watts does your amp put out?

According to you, "playing around with the wire" caused problems. It sounds like somehow your power wire is grounding out somewhere,which would cause major problems, especially if it was before the fuse (you do have an inline fuse on the power line,right?) Also you said "OEM battery" although thats not an OEM battery. But anyways, its also possible that your power wire is frayed near the end where it goes into the amplifier (especially if you used a bare wire-terminal connection), and it may be touching the ground wire creating a major problem. Normally the fuse would blow in this situation but I can't see the fuse in your picture so I'm not sure.

slosvt 05-09-2009 12:35 PM

I was just wondering if you solved your problem, because I am having a similiar situation.

I have two amps (one running components up front and one running the sub) and when I turn the volume up the front speakers cut off, but the sub keeps pounding. I have checked the Alpine amp powering the components and the green power light never turns off, but the speakers cease to output sound. When the sound does come in it is clear, but its on for a second, out for 2, on, out, etc... Only at higher volumes (not full blast, but 75% or greater). I currently have 4 guage wire powering both amps, but feel that the 4 guage might be too much for the Alpine, even though it never loses power (according to the green light).

Does anyone think switching to a 8 guage power/ground setup might help solve my problem?

slosvt 05-10-2009 02:53 PM

Well, I can confirm that the switch to 8 guage wire did not solve my problem. I guess I need a new amp, but I am not sure if the component crossovers have anything to do with it? Any chance they are cutting the power to the speakers and the amp is fine?


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