Question about JBL GTO75.4 Car Audio Amplifier

1 Answer

My Jbl mono amp cuts out

My amp is pushing two jbl 8 inch subs and they just stopped working the 3 blue led's will flash and the speakers make a thump at random intervals and the lights in the car will dim at the same time

Posted by on

  • Anonymous Mar 28, 2014

    i installed a gravity 2100.1 mono block amp and now Im getting this unwanted humming and/or thumping in my subs. is there an easy way to fix this problem

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 631 Answers

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

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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.

Jan 02, 2010 | JBL BP1200.1 Car Audio Amplifier

3 Answers

JBL PB10 subwoofer sounds distorted and lights on the front flash


More likely to be the Class D power amp module, but you should look through the service manual to make sure all the parts are installed correctly. My PB10 AMP module went out and you cannot get one anymore.
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

Nov 10, 2009 | JBL PB10 Subwoofer

1 Answer

Bridging outputs on JBL BP300


Hello paulnkate,

The BP300.1 is a mono (1 channel) amp. You cannot bridge a mono amp. Bridging is a method of combining the outputs of 2 or more channels of a multichannel amp into a single mono load. On your amp you would connect a single sub to one of the +'s and one of the -'s (either one is OK, they are connected internally). The other pair of terminals is just for convenience, making it easier to connect, if you want to power 2 subs.

Hope this helps.

Jul 20, 2009 | JBL BP300.1 PowerValve Series Car Audio...

1 Answer

Pb12 makes thumping sound after warming up


Hello there..Thats normal only if your sub volume and the pre amp is turned up..Your amp is the cause of the speaker jump..Turn amp volume sub level down a few and check your wire from sub to amp..If all of that is good is a normal operation for pre amp warm up in sub if level is turn to max..Try unplugging amp freom sub then turn sub on stand alone(just sub outlet plugged in and no wires from base amp plugged in..If sub stops the its the amp making the problem..If it still is there then the pre amp is either dusty on inside or the outlet plug that it is plugged in doesnt have a good ground..Hope these help to solve your problem..Have a great day...

Apr 02, 2009 | JBL PB12 Subwoofer

2 Answers

I have a jbl W15GTi MKII 15 inch and on the speaker it has to a a an b side and two wires no each side how do you hook it up


Your speaker has dual voice coils. You can hook it up so that it is 2 ohm or 4 ohm depending on wat the amp can handle. You can try hooking it up by matching the colors or like any other speaker.

Jun 07, 2008 | JBL Car Audio & Video

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.

Mar 07, 2008 | JBL PB10 Subwoofer

1 Answer

JBL Sub Amp Wiring Please


it seems rather redundant to bridge a mono amp. Unless the instruction manual states otherwise, i would assume that one speaker output is identical to the other (ran in parallel, like an A or B speaker, not like Left or Right), and you would present the amp with a two ohm load by wiring one speaker to each output. Bridging it may or may not work, but, again, it just seems redundant.

Mar 01, 2008 | Car Audio & Video

1 Answer

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.

Dec 21, 2007 | JBL BP1200.1 Car Audio Amplifier

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!

Dec 05, 2007 | JBL GTO75.4 Car Audio Amplifier

Not finding what you are looking for?
JBL GTO75.4 Car Audio Amplifier Logo

372 people viewed this question

Ask a Question

Usually answered in minutes!

Top JBL Car Audio & Video Experts

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1141 Answers

isaac johny
isaac johny

Level 3 Expert

796 Answers

yadayada
yadayada

Level 3 Expert

69199 Answers

Are you a JBL Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...