Subwoofer randomly sounds like thunder

Rob4226 · 03:08 AM

A few weeks ago my JL w6's started cutting out and then rumbled sounding exactly like thunder, then return to normal. I checked all the connections and they all look and feel solid. What could be causing this? Thanks.

Revisiting this issue 4-10-2012

I think the JL 1000/1v1 is the problem. See latest posts. Thanks.

Custom Chris · 21st June 2011, 06:06 PM

What equipment are you running, who installed it and do you have a DMM?

Rob4226 · 21st June 2011, 06:57 PM

I'm running an alpine Iva-w505, JL 1000/1, and 2 JL 12" w6's im a sealed JL box. I installed it and what's a dmm?

Perry Babin · 21st June 2011, 07:01 PM

Does moving the RCAs where they plug into the amp cause a problem?

Rob4226 · 21st June 2011, 07:07 PM

Nope, I tried that but I may cut them off and put new ones on anyway just to try.

Perry Babin · 22nd June 2011, 01:41 AM

I was concerned that the RCA shield ground in the amp may have been defective. That can cause symptoms similar to what you listed. If moving the RCA cables doesn't make a difference, the RCA shields on the amp are likely OK and it's likely that the RCA connectors on the cable are OK also.

DMM - Digital Multi-Meter

Rob4226 · 22nd June 2011, 02:03 AM

O ok I do have a DMM. I agree that its got to have something to do with the RCA's. I remember the first time it happened was with my trunk loaded with crap for college. But last time it happened I pulled over and put the back seat down to move and pull on all the RCA's and power-grounds but I couldn't get the very loud rumbling to stop. The rumbling is usually proceeded with no sound from the subwoofer at all. Any ideas?

Perry Babin · 22nd June 2011, 02:18 AM

The subject line made it sound like it was intermittent. If it's constant, disconnect the RCAs from the amp. Does the rumbling stop?

Rob4226 · 22nd June 2011, 02:23 AM

It is intermittent. After it stops there is no sound for a couple minutes then it goes back to normal.

Cr@sh · 22nd June 2011, 02:34 AM

Check your amp grounds, Where is the headunit grounded?

21st June 2011, 05:05 PM	#1
Rob4226 diyAudio Member Join Date: Jun 2011	Subwoofer randomly sounds like thunder (JL 1000/1 repair?) A few weeks ago my JL w6's started cutting out and then rumbled sounding exactly like thunder, then return to normal. I checked all the connections and they all look and feel solid. What could be causing this? Thanks. Revisiting this issue 4-10-2012 I think the JL 1000/1v1 is the problem. See latest posts. Thanks. Last edited by Rob4226; 11th April 2012 at 03:08 AM. Reason: revisiting this issue almost a year later haha

21st June 2011, 07:01 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Does moving the RCAs where they plug into the amp cause a problem? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

22nd June 2011, 01:41 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I was concerned that the RCA shield ground in the amp may have been defective. That can cause symptoms similar to what you listed. If moving the RCA cables doesn't make a difference, the RCA shields on the amp are likely OK and it's likely that the RCA connectors on the cable are OK also. DMM - Digital Multi-Meter __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

22nd June 2011, 02:18 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The subject line made it sound like it was intermittent. If it's constant, disconnect the RCAs from the amp. Does the rumbling stop? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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21st June 2011, 06:06 PM	#2
Custom Chris diyAudio Member Join Date: May 2011	What equipment are you running, who installed it and do you have a DMM?

21st June 2011, 06:57 PM	#3
Rob4226 diyAudio Member Join Date: Jun 2011	I'm running an alpine Iva-w505, JL 1000/1, and 2 JL 12" w6's im a sealed JL box. I installed it and what's a dmm?

21st June 2011, 07:07 PM	#5
Rob4226 diyAudio Member Join Date: Jun 2011	Nope, I tried that but I may cut them off and put new ones on anyway just to try.

22nd June 2011, 02:03 AM	#7
Rob4226 diyAudio Member Join Date: Jun 2011	O ok I do have a DMM. I agree that its got to have something to do with the RCA's. I remember the first time it happened was with my trunk loaded with crap for college. But last time it happened I pulled over and put the back seat down to move and pull on all the RCA's and power-grounds but I couldn't get the very loud rumbling to stop. The rumbling is usually proceeded with no sound from the subwoofer at all. Any ideas?

22nd June 2011, 02:23 AM	#9
Rob4226 diyAudio Member Join Date: Jun 2011	It is intermittent. After it stops there is no sound for a couple minutes then it goes back to normal.

22nd June 2011, 02:34 AM	#10
Cr@sh diyAudio Member Join Date: Aug 2009 Location: Detroit	Check your amp grounds, Where is the headunit grounded?

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