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BMW 3-Series (E90 E92) Forum
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Amp whine
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| 03-18-2018, 07:20 PM | #1 |
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Amp whine
Hello, today I was cleaning my car and noticed one of my amps is making a whining noise. The car was off and the amp turned on like it always does when I open a door. I’m using the technic harness. I have 2 amps, one is for a sub in trunk and the other is for the two underseat subs. The one for the underseat is the one making the noise. Also if I move the fuses that are attached to the amp the noise makes a wavy sound.
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| 03-18-2018, 11:55 PM | #2 |
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Lieutenant General
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1) Remove Inputs from the amp. Is the noise still there when powered up.
If no then the noise is coming from the head unit or input wiring. 2)As a double blind test hook up some other source to the amp and see if the noise is still present. Which BMW audio system and which Technic Harness. |
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| 03-19-2018, 09:07 AM | #3 | |
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Quote:
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| 03-19-2018, 10:05 AM | #4 |
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Check that your grounds are all tight and metal to metal.
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2009 335i Saphire Black M Sport "Leopold" Cobb stage 2 aggressive tune, Mishimoto FMIC, Cobb charge pipe, Cobb catted down pipes, Forge diverter valves, BMS inlets and DCI, Cyba scoops and M Individual Audio retrofit and M3 gauge cluster retrofit. 2011 328i Titan Silver M Sport "Franzel" <--Wife's car |
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