Question about JBL GTO1020 Car Subwoofer

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Jbl in car sub works intermittently

The sub works fine sometimes then just cuts off instantly no wierd noises just nothing, but when this accures i hooked the output from the amp to a seperate speaker (6x9) and it works fine so i think the amp is ok. however when the sub does cut out if i apply light pressure to push the sub in, towards the box it starts to work again??? then when i release the pressure it cuts out?????? the sub i believe is a gto series??? its a 10inch 1000watt?? if this helps.. many thanks.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 631 Answers

SOURCE: jbl gto 3501 amp

It's a mono amp. There's no bridging with this amp.

The two pairs of speaker terminals are connected together internally. The second set of terminals is for convenience.

Posted on Dec 21, 2007

  • 631 Answers

SOURCE: my Jbl mono amp cuts out

It's likely that the amp has blown output transistors. To eliminate other possible problems, read through the following page:

Amp Going into Protection Mode

Let me know if you have any other questions.

Posted on Sep 17, 2008

MrScary66613
  • 1990 Answers

SOURCE: my twin jbl 12'' sub in a enclosure dont seem to be giving bass

Those 12's Need to be in a Ported Inclosure to release the Air that the Bass Produces. Use a 1 Inch Key Hole Bit and make 1 Hole at the Top Corner of Each Portion of the Box. Top Left and Top Right. Please Rate My Response! Thanks!

Posted on Feb 02, 2009

zoomiezz
  • 50 Answers

SOURCE: jbl sub power dumb blonde needs help!

sound like something shorted out or is shorting it out sounds like its in protect mode.-z

Posted on Feb 21, 2009

  • 51 Answers

SOURCE: jbl gto 75.4 right channel not working

Hi

It's rare that 2 channels will fail simultaneously, are you sending 4 signals to the amp or just 2?

If you are sending just 2, perhaps the problem lies before the amp in the cabling to it, or the output from the headunit. If you are sending 4 signals then there may be a fuse in the amp that drives 2 channels out of the 4. Of course this may be the case should you just be sending 2 signals.

Posted on Mar 28, 2009

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2 Answers

JBL amp, worked fine untill 2 days ago. protection light on..


might have roasted your speakers voice coils a little which may be sending the amp into protect mode throw a speaker on it that you know works and if it doesnt trigger the protect circuit then you probably have a blown or almost sub.

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Sometimes bad caps show a lifting or rounding of the top of the cap, sometimes this top will split from heat and pressure and sometimes it will not show any sign of damage but will be dry inside and its capacitance value will drop to a very low value. Replace the big power supply caps and test again. Get the same size, value and voltage rating. You can go higher on voltage rating and a bit on value. Getting a similar size or something that will fit in the same space is important also.

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Something inside the amp is busted.... stop hitting it... and replace it.

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I had the same chirping issue with the sub. I found a document that talks about replacing the C5 capacitor for a 47mfd type instead of 470mfd. This solved the chirping issue however I still experience an intermittend issue with the power on indicator flickering off and on. Anyone hear of the fix for this?

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1 Answer

Thump at the time of shutoff


The amplifier in the sub as with any other amplifier has a capacitor in it. Essentially a battery that holds a charge. When you trun things off such as subs or amps with a powerstrip instead of the intended on off button, the power supply has been cut, but the capacitor is still energizing the unit. So it catches the noise in the line.

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2 Answers

Subwoofer just stopped working. There's power but no sound.


I have the same problem. My guess is that the subwoofer coil is messed up. You MIGHT have to get it recoiled. But before you do any of that get someone with a sub to play their sub in your car, if it works.... then your sub is messed up, if not.....then your amp is messed up ( trial and error ). Today i noticed my subs rubber surrounding is crooked, that may be the problem for me. Also when I press down on the sub it makes a sticking sound, like something came loose. So once i get everything opened and out ill let you all know the solution. Good Luck!

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1 Answer

Noise when it turns on


have you checked your music source? Some systems like computers have a sort of output first before normalizing, which isn't your powered subs or powered amps problem. Try plugging in a regular solid state player like an ipod if the humming is still there when automatically turning on or off...

Dec 06, 2007 | JBL PB12 Subwoofer

3 Answers

Amp cutting out, intermittent fault


i suggest using a 4 gauge or smaller i had the same problem. i switched from 8 to 4 and no problems!

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2 Answers

Jbl subwoofer


There is actually some good news.  I had this problem with my PB10s (1 have 2 PB10s and 2 PB12s) It is one of 2 things, the first is that it could be a capacitor and resister combination on the amplifier board (which was the fix for our PB10 with the same problem), or 2nd, the AMP IC, which is not available for the PB12. hmmm

Sep 10, 2007 | JBL PSW-D112 Speaker

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