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SB30 subwoofer makes poPping soUnd - Harman Kardon Audio Players & Recorders

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Posted on Jan 02, 2017

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SOURCE: 15 inch velodyne subwoofer making a loud popping sound

If you have changed the signal source, then these may not be the problem at all, it may be that you have the sub output set to low on your processor.


This may be one of these problems.

It could be the "auto on" circuit.
If you change the switch on the back of the unit to always on does it still do this? if not then it is the auto on circuit that is the problem.

The driver mounted servo unit is starting to fail.

A cap in the amplifier input section may be going bad.

You nwill need to contact Velodyne for repair of the unit.

Posted on Mar 28, 2009

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turn on the amp and you know that the amp is good and you hear nothing
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15 inch velodyne subwoofer making a loud popping sound


If you have changed the signal source, then these may not be the problem at all, it may be that you have the sub output set to low on your processor.


This may be one of these problems.

It could be the "auto on" circuit.
If you change the switch on the back of the unit to always on does it still do this? if not then it is the auto on circuit that is the problem.

The driver mounted servo unit is starting to fail.

A cap in the amplifier input section may be going bad.

You nwill need to contact Velodyne for repair of the unit.

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1 Answer

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Check any wiring coming or going to the subwoofer. It sounds like it could be a loose connection.  Is there a LFE or bass boost knob on your subwoofer? Does turning that up/down cause the crackling (if it exists). If so, you could use some tuner cleaner to clean the contacts on the potentiometer knob.

If the crackling is on the subwoofer only, it might be damaged from bottoming out.  See if you can remove the baffle or grille covering the woofer and inspect for visual problems. You can also try to lighly push in and out on the subwoofer to hear if it makes any scraping sounds. If so, it is definitely damaged and the driver will have to be replaced.

Mike

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