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Powered Subwoofer not working

My powered sub woofer turns on and immediately turns right back off, please help. I have tried everything.

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  • eljay01 Jun 15, 2008

    I'm having the same issue...my subwoofer will work for a few minutes, and then turn off automatically. It will turn back on (temporarily) if I take out and then plug back in the system cord.

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5 Suggested Answers

SOURCE: jvc th m603 center unit - powered subwoofer

Yes go to JVC.com It will cost you $20.00

Posted on Mar 31, 2008


  • 4234 Answers

SOURCE: No power to subwoofer

The subwoofer is designed to be "on" at all times. It will detect signal from the cable and should start by itself. So yes, the pin cable must be connected.

Dan

Posted on May 20, 2008

SOURCE: JVC sp-pwm606

Hello, it,s very possible that it,s circuit protector built in to the sub (if it,s a self powered sub) gets to the point of overload and shuts off as a protection so that the speaker won,t get damaged and also so the internal amp tha,t pushing the speaker sound is also protected since theese amps all have heat buildup, their are two types of subwoofers ,They are the powered ones and the ones that are powered bt the surround amp ,The ones powered by the stereo surround amp/tuner tend to throw out less power to the sub and the ones that have internal power are mostly higher powered , Another thing you might want to check is your polarity to the speakers and also the omage , Most home theater system speakers are 8 ohm,s but their are speakers and amps that can be changed to 6 ohm,s ..so you might want to check the speaker rating also . Well hopefully you can use theese different methods to at least troubleshoot and discount the thing,s that are not the issues , Good luck and hope theese sugestions might help you , Sincerely Glenn

Posted on Mar 04, 2009

brianself73
  • 4 Answers

SOURCE: Sub woofer its on for 3 sec..

your cooling fan is not engaging and coming on like its suppose to. One, the fan is probably burned out, which sucks because its low voltage and the only thing on the board that is low voltage. Two, there is a thermostat type component that tells the fan to start which HAS burned out and doesnt start the fan accordingly. If you look at the back fan and turn everything on you will see the fan either doesnt start or starts right as the relay trips turning the sound components off. If it starts at all your fans good.The thermostat component will need to be replace and I cant recommend a source. Just trying to explain the problem so you can look for the right repair. Hope it helps. I have one of these and have found this is the problem, but cant find the solution.

Posted on Dec 07, 2009

  • 21 Answers

SOURCE: I have a JVC TH-M303

A defuser is burned.

Time for a new sub.

Posted on Nov 19, 2010

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1 Answer

How do I hook up the sub woofer to my home stereo system


You don't say what make or type either of the appliances are, so I can only answer in general terms.
First look at the back of your stereo system and see if there is a dedicated subwoofer output. If there is you should be able to find the correct lead between the two units by looking at both the connections. If the subwoofer is a powered one. IE with a mains plug on it, you have to plug it into the mains before it will work at all. The connection points also then need to be hooked up to the amp. If it's not a powered subwoofer then your main left and right channels speaker wires need to be split into using the subwoofer terminals provided. Another set of terminals on the sub, then lead to the main speakers.
Lastly if it has a dedicated subwoofer output, then the amp might have a setting that turns this on or off. So you might need to switch it on.

Oct 19, 2016 | home Audio Players & Recorders

1 Answer

I wish to replace a subwoofer on a surround sound system


In most surround sound systems the sub woofer is powered separately and uses a standard RCA coax connection to the receiver/amplifier.

Replacing is simply plugging in the new and reconnecting the coax cable.

Usually the audio signal is Dolby Digital 5.1 the (.1) is the LFE Sub-woofer. The connection is between the Subwoofer RCA connector on the amplifier and connects to the (LFE-Line) in on the subwoofer speaker.

Hope this helps?

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Aug 09, 2016 | Audio Players & Recorders

1 Answer

Powered subwoofer amp repair? On and off works fine.. very weak signal to sub. All wires checked and working fine.


For starters, it is a home theater in a box. With that being said, highly consider upgrading before spending more money on the system. If thats not even an option, have you tried adjusting the level of signal being sent from the receiver out to the sub? It sounds stupid, but this is often over looked and can sometimes be tricky depending upon the type of receiver you are using, to adjust the level being sent to the sub... Typically when a subwoofer has little to no sound, this is the issue. Also, is the sub powered (does it have its own amplification using a power cord that plugs into an electrical outlet? If so, does it have a volume knob on the back, and does it respond when turning the knob? If its not powered, than your problem is what I described above, unless you've already done that. If that is the case, your speaker is fried... Hope this helps

Jun 19, 2014 | Cerwin Vega CMX 5.1 Home Theater Package...

1 Answer

No sound from sub


  1. Are the stereo speaker wires run to the subwoofer and out to the stereo speakers
  2. Make sure the notch filter is off
  3. Refer to the manual on line: http://www.manualslib.com/manual/105794/Mordaunt-Short-Ms909w.html?page=7#manual
  4. READ THE MANUAL

Nov 12, 2013 | Mordaunt Short Aviano 7 - Powered...

1 Answer

Connecting sansui subwoofer to back of tv panasonic


Hi,
I assume that the sub-woofer is "POWERED TYPE" ..otherwise if it is a PASSIVE type you can not..
So,if it has a power plug for 110 VAC it is "powered type" ..Than you need to find out the AUDIO output 2xRCA plugs of your TV on the back and connect it to the 1x RCA input of Sub...you need a "Y type RCA cable " to make 2x stereo output of TV into the 1x MONO input RCA jacks for sub..Than while listen TV your sub will work too but you need volume adjustment once on the sub controls (if it is a Powered )

Take care and if it succeeds please Remember to rate/vote and give me 4 Thumbs Up
for Helping out the Community :)

Hope this helps!
...
..

Jun 21, 2011 | Audio Players & Recorders

1 Answer

I recently picked up the THC-c60 system without the supporting amplifier. Can I still use the subwoofer and the speakers without the amp? I note that it also came with a DIN cable, is there some way to...


You can use the sub-woofer and the speakers even without a supporting amplifier. The sub-woofer alone is powered with 167w per channel enough to power all the speakers. The DIN cables used to connect the sub-woofer to any source device like a computer, multi-media projector and others.

Dec 02, 2010 | JVC TH-C60 System

1 Answer

Want to attach a extra subwoofer


If you have a "subwoofer-out" jack on the back of the receiver, you can put a y-cord on it and connect it to two powered subwoofers. Don't expect a big difference in the sound, however. You may even get less bass depending on where you position the sub-woofers.

Apr 29, 2009 | Audio Players & Recorders

2 Answers

Subwoofer with speaker wire?


Back in the old days, subwoofers were powered by the voltage from your receiver, through speaker wire.
Nowadays, subwoofers have their own power, hence not having speaker wire connections anymore.
It's unlikely that you'll be able to connect your old subwoofer to your new receiver.
You'd need to get a new one, which if you don't mind buying closeout, can be found on eBay pretty cheap.

Mar 16, 2009 | Sony DAV-DX255 System

2 Answers

Missing lead


typically i would say connect it in parallel to the right or left channel..assuming your system dosent have a sub woofer output and your subwoofer is powered

Mar 05, 2008 | JVC TH-S3 System

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