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#1 11-21-2007 4:21:08 PM
Opinions: My Sub is Sinking!
Here's something off topic, but I figure this is the perfect group.
I just moved and after setting up my home theater system, I noticed my subwoofer was making a static-rumbling sound. The subwoofer is a amplified JBL 8-inch sub. After it warmed up the noise dissipated, but left a continuous low-frequency low-level buzz. My guess is a capacitor (or whatever) in the amp has dried up and is dying.
I just spotted a 12-inch amped Sony sub in a BB ad for $180.
The question is ... what sub would you recommend? Any online shops you would recommend?
Joe
Last edited by HDJoe (11-21-2007 4:21:35 PM)
My System: Comcast Motorola DCH-3416 HD-DVR (on a APC UPS), Samsung LN-T4065F LCD HD TV (on a APC voltage regulator), Sony DVD Recorder RDR-GX315, Yamaha HTR-5460 Home Theater unit, JBL satellites and subOffline
#2 11-22-2007 7:15:54 AM
- salspalden
- Member
- From: Bucks County, Pa.
- Registered: 06-17-2006
- Posts: 41
- PM
Re: Opinions: My Sub is Sinking!
HDJoe wrote:
Here's something off topic, but I figure this is the perfect group.
I just moved and after setting up my home theater system, I noticed my subwoofer was making a static-rumbling sound. The subwoofer is a amplified JBL 8-inch sub. After it warmed up the noise dissipated, but left a continuous low-frequency low-level buzz. My guess is a capacitor (or whatever) in the amp has dried up and is dying.
I just spotted a 12-inch amped Sony sub in a BB ad for $180.
The question is ... what sub would you recommend? Any online shops you would recommend?
Joe
Have you checked all your cables? The hum may be due to a loose or bad cable or a signal cable running parallel to a power cord. Seems unlikely that your sub amp decided to die between houses.
Try changing cables/power cords and moving things around.
Also try kicking the damn thing hard enough to remove any doubt that it's broken, then buy the sub you linked, the 12"/200W Sony. It's on sale for $99 and is bound to be an improvement over the 8" JBL.
Sals
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#3 11-22-2007 10:29:07 AM
Re: Opinions: My Sub is Sinking!
salspalden wrote:
...
Also try kicking the damn thing hard enough to remove any doubt that it's broken, then buy the sub you linked, the 12"/200W Sony. It's on sale for $99 and is bound to be an improvement over the 8" JBL.
...
It's also sold out. 
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#4 11-22-2007 10:54:34 AM
Re: Opinions: My Sub is Sinking!
What made me think it was an amp problem was the the sub being powered off for about two days. When I plugged it up again, that's when the noise started. After it warmed up, the noise decreased.
I should have mentioned that I disconnected the LFE line-level feed on the back of the sub (no signal going to the sub) and the noise remained.
The power cord is attached.
My System: Comcast Motorola DCH-3416 HD-DVR (on a APC UPS), Samsung LN-T4065F LCD HD TV (on a APC voltage regulator), Sony DVD Recorder RDR-GX315, Yamaha HTR-5460 Home Theater unit, JBL satellites and subOffline
#5 11-22-2007 10:55:58 AM
Re: Opinions: My Sub is Sinking!
Also, J&R and B&H Audio have some pretty good deals too.
My System: Comcast Motorola DCH-3416 HD-DVR (on a APC UPS), Samsung LN-T4065F LCD HD TV (on a APC voltage regulator), Sony DVD Recorder RDR-GX315, Yamaha HTR-5460 Home Theater unit, JBL satellites and subOffline
#6 11-25-2007 7:28:37 AM
- salspalden
- Member
- From: Bucks County, Pa.
- Registered: 06-17-2006
- Posts: 41
- PM
Re: Opinions: My Sub is Sinking!
HDJoe wrote:
What made me think it was an amp problem was the the sub being powered off for about two days. When I plugged it up again, that's when the noise started. After it warmed up, the noise decreased.
I should have mentioned that I disconnected the LFE line-level feed on the back of the sub (no signal going to the sub) and the noise remained.
The power cord is attached.
Try plugging it in to a different outlet. Are you using one of the convenience outlets on your receiver? Try plugging it in to a wall outlet that's on a different circuit breaker than the outlet all your other stuff is plugged into. Use a heavy duty ext cord to reach another room if you have to.......if that doesn't work, go shopping.
Sals
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#7 12-03-2007 11:56:06 AM
Re: Opinions: My Sub is Sinking!
Dirty power maybe... try the above suggestion by Sals. If still a problem it may exist with the overall power supply into the house. Try a power conditioner and if it clears up call your power company and tell them that their dirty power is wreaking havoc with your electronics.
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