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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 03-26-2013, 10:24 AM
X5bimmerguy X5bimmerguy is offline
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HK subwoofer not working in 2011 328i

The driver sub works great, but the passenger sub does not. Upon removing the passenger seat and removing the speaker grate, it appears some liquid spilled under seat (don't know situation as I' m the second owner). The speaker connector has sticky goop all over it, perhaps disrupting the connection. Of course, warranty won't cover damage....

My plan is to clean the connector and see if this fixes the problem. If not, any ideas what I should try next? Does the HK amplifier have some build-in protection so that a speaker short will not ruin amp? If the driver side sub works, does that mean the amp should be OK?

Any thoughts/suggestions much appreciated!
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  #2  
Old 03-26-2013, 11:49 AM
ctuna ctuna is offline
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Measure the coil resistance with an ohmeter.

Measure the coil resistance with an ohmeter.
That will at least give you an idea if its electrically intact.
Should be 2 to 3 ohms.

Also for stereo questions go here
http://www.e90post.com/forums/forumdisplay.php?f=27

You may be able to find somebody who will sell you one at the above location.
You should identify which of the three system you have before trying to replace it.

Last edited by ctuna; 03-26-2013 at 11:51 AM.
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  #3  
Old 03-26-2013, 12:28 PM
X5bimmerguy X5bimmerguy is offline
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Thanks for the input, Ctuna.
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Old 03-26-2013, 03:09 PM
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Technic Technic is offline
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Quote:
Originally Posted by ctuna View Post
Measure the coil resistance with an ohmeter.
That will at least give you an idea if its electrically intact.
Should be 3-4 ohms.

Also for stereo questions go here
http://www.e90post.com/forums/forumdisplay.php?f=27

You may be able to find somebody who will sell you one at the above location.
You should identify which of the three system you have before trying to replace it.
Fixed.
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  #5  
Old 03-26-2013, 06:48 PM
ctuna ctuna is offline
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I measured my underseats in a Hi Fi system at 2.1 ohms.

I measured my underseats in a Hi Fi system at 2.1 ohms.
Stock under seats measure 2.1 ohms at the amp tightening screws.
And I was using a Fluke 77 digital multimeter.
This was during my xd 600/6 install.
According to the BMW stereo pdf all speakers in the Hi Fi are 2 ohm . I don't
know all the details of the other systems but they are suppose to be correct
in this pdf.

http://www.e90post.com/forums/attach...2&d=1266451970

Last edited by ctuna; 03-26-2013 at 06:52 PM.
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  #6  
Old 03-27-2013, 07:28 AM
X5bimmerguy X5bimmerguy is offline
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Update: Removed passenger seat and exposed subwoofer. Connection between wire from amp and subwoofer covered in dried sticky liquid (the hidden cost of buying a pre-owned vehicle). Disconnected and cleaned both ends thoroughly with isopropyl alcohol. Let dry. Checked resistance of subwoofer with ohm meter: 2.6 ohms. Reconnected sub to amplifier and still no sound. Recommendations? Thanks.
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  #7  
Old 03-27-2013, 07:36 AM
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furby076 furby076 is online now
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This is the main thing I hate about the speaker - it's placed in an area that can get liquids easily spilled on it. It doesn't even take someone to spill a can of soda, just walk in from the rain. It would have been much better if the speakers were connected to the seats which would make them elevated off the floor by an inch or two. Or at least make these speakers water proof.

Why not take it in for service? Don't mention you took anything apart
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