Data or electrical noise through speakers
#1
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Location: Santa Maria
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My Ride: 528i 2010
Data or electrical noise through speakers
I have a 2010 528i without a Logic 7 no Navigation or CD changer. When I get into the car and put the key in I can here everything power up. I hear no noise over the stereo at no volume and all sources. Then I turn the engine on and the sound of data transfer like electrical feedback starts in the background. It is intermittent like "zzz zzzzzzzz zzzz zzzzzz zzzz" it doesn't increase with volume and can be heard with mute on or with any input. It goes away when I turn the engine off. I guess the best description would be like hearing a CD player searching for a track. I wonder if it is feedback from an engine part since it only happens when the engine turns on? It is on all interior speakers. Any help would be appreciated as BMW isn't helping much.
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Location: Costa Mesa, CA
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My Ride: 04 545i sport, stick, L7, sat, nav. Charcoal/ runflat/ cdv delete.
Suede headliner/ trunk, 3 way front speakers, four 8" subs in rear shelf, ACM, iPod dock in ash tray using gateway 500 with MP3 text and video on screen, MRTM aluminum pedals/ door pins, 10 farad cap, sound processor, line conditioner, 2 amps ( 4x100 and 2x200)
a 2010 E60LCI would have an amplifier for the Hi-Fi system, same location as the Logic7 amplifier would be. That amplifier has an analog input, like factory RCA cables, not optical input. It actually is possible for that amplifier to pick up noise from the input cables, and from any ground loops. The ZZZ description sounds like a audio or power ground loop. There are all kinds of things that could actually be wrong, such as software update, bad radio or amplifier, corroded wire plug/amp due to water, or a bad alternator/battery. I think you are going to need to find a tech that understands audio and BMWs. Is it under any warranty?
#3
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My Ride: 2007 530xi 3 pedal
Actually I have this issue too. I have isolated the noise to the rear section of the car. I have a 2007 530xi with the logic 7. I put a sub (2 10") into the trunk and had to take it out because it make things a lot worse. I had power running directly from the battery to the additional amp. Let me ask you, does it change pitch if you rev the car? Mine did. Try driving around with the rear sats folded down. You will hear it immediately.I also put in a new battery. I did not have it coded to the car though.
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My Ride: 528i 2010
I am running a good quality hi/lo electronic pass from the M-ASK speaker outputs to a JL Audio amp. It is not the amp though because if I have the key in the ignition and have the radio on the noise isn't there. It only starts after I start the engine. Then it starts after about 3 seconds after the engine starts. If it was the amp it would start when the amp powers up. Could the fan on the M-Ask unit or alternator feed back be a possibility? Not warrantied for electrical since it has been modified
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