JBL Venue Sub12 making odd sounds - AVS Forum
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post #1 of 13 Old 09-26-2012, 08:35 PM - Thread Starter
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I have a JBL Venue Sub12 subwoofer. Lately it's been making ODD sounds after it has been off for about 10 or 15 minutes. The sound is like a like a gurgling type sound with a brief rumble (not the good kind of rumble). Any idea what happening?
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post #2 of 13 Old 09-27-2012, 08:01 AM
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Off, as in powered off, or off as in standby mode?

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post #3 of 13 Old 09-27-2012, 08:09 AM - Thread Starter
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Off as in standby.
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post #4 of 13 Old 09-27-2012, 08:27 AM
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Try disconnecting the RCA cable from your receiver. There may be some type of interference, and if so you'll need to isolate the source.

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post #5 of 13 Old 09-27-2012, 12:43 PM - Thread Starter
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The sub has been in the same place for over 3 years. Just yesterday, 9/26/2012, installed a better, thicker cable but it still makes that odd sound after being on standby 10 or 15 minutes.
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post #6 of 13 Old 09-27-2012, 01:24 PM
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But does it make the same sound without a cable connected?

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post #7 of 13 Old 09-27-2012, 03:01 PM - Thread Starter
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I'll have to give that a try later this evening.
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post #8 of 13 Old 09-28-2012, 07:07 AM - Thread Starter
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It does not make that sound when I disconnect the cable, but about 30 minutes after I reconnect the cable it does make the sound.
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post #9 of 13 Old 09-28-2012, 08:48 AM
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Do you have cable TV?

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post #10 of 13 Old 09-28-2012, 11:38 AM - Thread Starter
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Yes, Cox Communicaions is my cable provider.
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post #11 of 13 Old 09-28-2012, 12:35 PM
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You may have a ground loop issue. Although historically the noise associated to that is pretty consistent, it might not be a bad idea to consider using an isolator on your cable line. Another thing you may want to try is an electrical adapter to remove the ground path on your subwoofer.

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post #12 of 13 Old 09-29-2012, 09:08 PM - Thread Starter
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Thanks. I'll have to look into that.
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post #13 of 13 Old 12-01-2014, 10:18 AM
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I am also having this issue

I also have a Venue Sub12 with these symptoms. Purchased in 2008, started making these sounds in 2014. To me, it sounds like a power discharge through the woofer after the unit has entered standby mode. The clicking at the very end sounds like the relay that controls the power amp. Right now I'm trying to research more details to make a decision between repair and replace. When the unit is on, it still sounds great. I don't think it is a ground loop issue or a bad RCA cable, and all my components including the receiver haven't changed since the initial setup in 2008.
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