Question about JBL GTO75.4 Car Audio Amplifier

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My amp hey, my sub and amp was over heatin when goin on this trip coz i had to many things in my boot .. the sub n amp keep turin off so i left it for awhile n then the sub n amp would come back on fine n work noraml... but all of sudden my amp and sub n back speakers wont work normal my speaks keep makin a crackin noise n my sub wont work at all , n my amp wont either n it had the red protection light on . what do you think is the problem could it just b my amp or have i blown my sub or speakers which has made it go on to protect. thanks

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  • drewbritton0
    drewbritton0 Jul 06, 2012

    its caused buy sweeting no matter where u put it its aways going to sweet all jbl amps do you have a bridge inside your amp that has crooded and broke apart an easy fix mine done the same thing but i tooke the bridge peace out of an old tv i had for parts i solder it in and it works fine hope it helps u email me for help later

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Check your speakers with an ohm meter. They should have some resistance but not totally shorted. Its prob the amp that got fried. Connect the amp to the battery with no speakers attached to it if the protection light still comes on then the amp is blown.

If the amp is blown you can send it to people on ebay and get it fixed pretty cheap. Good luck!

Posted on Aug 18, 2008

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ProSub 600 tripping off during playback of low bass and turns on after a while but works perfectly if volume is turned down. what could be the problem?



  • The DSW ProSub is a nice amplified sub. The reason it is shutting down is the amp is being worked to hard and it's going into thermal mode and after you turn down the volume and it cools down it's coming back on. To much of this and you will have a nice sub and no amp to run it.
  1. One thing to do is keep the sub/amp in a well ventilated are and put a fan on it if you can to help move the heat away from the unit.
  2. The amp is rated at 250 watts so if you push it to hard it's gonna keep shutting down. So turn it down a little so it runs longer and smoother or add another sub to the set up if you need it louder (like we all like). One sub can only do so much.
  3. Also make sure if the receiver your using has a base setting or an EQ that you keep them levels set a little lower. Most receivers and home theaters already have an amp in them and you don't want to run to much of that into another amp. It's over kill. Find that happy medium.

  • If you have any questions or comments please feel free to ask.
  • Thank you for using FixYa.
Regards, Tony

Jul 20, 2011 | Definitive ProSub 800 Subwoofer Speaker

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Hey i dont know to much about amps, but me and my friend (he knows a decent amount about amps) would plug the power into the amp and the green light would come on. Though when we plug it into the subs, the...


Are you connecting positive to positive and negative to negative from the sub to the amp? If so, try positive to positve (+) in the far left channel and then the negative to negative (-) on the far left channel to. If no luck do the same in the other channel with one sub at a time. Try one sub at a time, Dont try an connect 2 or more subs to one channel as this would cause the amp to go into protect mode (red light you describe). Usually the positive wire has either a line down the wire, writting on it or has a red seperate wire with it when wire end stripped to connect it. Hope this helps and please rate...

Mar 11, 2011 | Bazooka EL1500 Car Audio Amplifier

1 Answer

Why is the red light that says protect on? my amp turns on but it dosent work, i have a sup hooked up & it dosent work. the red light that says protect is on.


first thing check all ground and power wires and make sure ur rca wire make sure it isnt cut in anyway. after that unplug ur sub and unplug the negative wire from ur amp, while its out check the fuses on the amp if all is well put all fuses back if not get new. then plug the negative wire back in if protect goes off check for heat and if no heat inspect the wires from speaker out put all the way to the sub, look for any wire touching another this is were most problems are even the smallest wire can trip a protect. if u still cant find the problem. an amplifier specialist is in order.if its trashed go on ebay and buy a powerbass there goin cheap right now. hope i could help

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1 Answer

I have audiobahn amp an 3 12inch subs my amp keeps kicking into protection whats my wiring opions mono amp adnot sure what ohm the subs are


Hey sound like your amp is seeing to low of indapendece. 3 subs can be hard to wire. please give mre info on the amp and the subs? dual v/c 4ohm subs are 2ohms wired pos to pos. neg to neg.

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I have a 220v 100 amp circuit breaker that feeds a sub-panel. The sub-panel has 3 circuits: a)60 amp Heater (unit 1 in house) b)60 amp A/C (unit 2 in house) c) 40 amp for pool equipment. The 100 amp...


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System Cuts Off


your amp is tripping out because the subs a drawing to much power get a better amp alpine subs demand a lot of power try a high current amp

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1 Answer

Sub keeps loosin bass


Its probably not your subwoofer- its likely that your amp is showing its age after 2 years of bumping -But it could be that you have partially roasted the coil on the sub which is tripping your amp into protect mode-thus shutting down throw a different sub in there for a week and listen to it and if it stops acting up then its probably the sub if it still shuts down then it may be time for a new amp

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Just installed my cva-1004 in my truck and all connections are good get dvd picture but no sound do i have to have the remote to select inputs i also hooked amp and subs up amp to the sub rc's at the back...


Hey Ryan I have the same thing dude has and my sound only works when I have my subs are hooked up. Without my subs hooked up I have no sound at all. Do you know how I can fix this?

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2 Answers

Protection light keeps coming on


Check the wiring between the sub and the amplifier. That's seems to be the only thing left that could cause a problem. If it's shorted to ground or pinched so the conductors are shorted together, it could cause the symptoms you listed.

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