Question about JBL GT150 Car Subwoofer

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Car sub not working

My problem is that I everything wired correctly to my amp but my subwoofer only play the music it won't beat. It was working great for two weeks but it just cut off Can someone tell me what's the problem?

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Re: Car sub not working

Has your amp been accidently swiched to stereo instead of mono,if so,swich it back.

Posted on Feb 17, 2007

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1 Answer

Hooked everything up in my car right but still no

hook your personal music player to sub amp turn on see if it works if so check settings in head unit or rca wires

Sep 07, 2014 | Car Speakers & Subwoofers

1 Answer

L7 15 not sounding do I wire the sub in a ported box

It's quite simple, positive from amp to positive of speaker, negative to negative. Make sure it's getting sub frequencies only and not full spectrum signal. Next (if everything checks out so far) see if the box dimensions and ports are correct for your sub. The sub and box combo will have lots of factors when considering tuning of the box and port size. You can find all sorts of info on the website for your sub. Qtas, max excursion etc etc etc. They might even list a few total volume and port dimension sizes for the sub you have and your taste in music. It's quite a science to get it right. More than buying a sub and buying/building a box to get great performance. When you get it right though... music to your ears (and chest)

Feb 20, 2014 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

1 Answer

Sub system won't play can't find in settings amo hooked up to subs yet still nothin help plz

Is the amp switching on? There are two 12v wires that have to be connected. One from a direct constant 12v supply source, and the other one from the ignition switch 12v source.Find a single 12v. supply which you can take from the lighter connection and then trace a 12v wire that runs from your ignition switch. This is mentioned in the amp manual.Double check. If the amp is coming on but no sound, then your wire connections from the amp are not correct.Or you have also connected the speaker wires incorrectly.Remmember not to connect the earth of the speaker wires to the direct earth(body of the car) but to the earth wires that are shown in the manual as this could blow the amp power IC. The earth wires of the speakers are marked -- and + respectfully and are also colour coded.You should have a RCA female plug connector from your amp to the subs. Check everything double and if still no luck their is a possibility that you could have blown an IC in the amp from wrongly connected wires. Hope this is not the case.

Apr 15, 2013 | Car Speakers & Subwoofers

1 Answer

My amps and subs are working, but my subs aren't hitting.

Try bypassing the remote wire staight to power instead of the stereo

Oct 26, 2009 | Lanzar VW12D Car Subwoofer

2 Answers

Sub woofer is blowing up and down even when head unit is off

This is an internal power supply failure - most likely a failed capacitor or bad ground trace..
Your amplifier requires repair.
To verify this - remove the RCA cables and if the "heartbeat" is still present - take the amplifier to a local repair shop that specializes in car audio and tell them your symptoms.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Jun 10, 2009 | Sony XS-L121P5 Car Subwoofer

1 Answer

Subwoofers won't work and they are brand new


I've got a pair of these MTX's subs powered from a Fusion 450 watt 2-channel amp. For the price, they are great. By the way, they are 4-ohm.

My first suspicion would be that something in the first incorrect wiring damaged either the amp or the subs. Can you explain specifically what the "installing the subs incorrectly" means? Was the amp output shorted out at any time or was it operated without a load? Either of these conditions will fry an amp and sometimes, the protection circuitry doesn't work either.

First make sure that your amp is still working. Check both the primary power fuse, usually located near the vehicle battery, and the fuses on both sides of the amp. Make sure that when you turn the system on, the power light comes on steady (blinking is protection mode). Test your subs one at a time on a speaker output.

Mar 29, 2009 | MTX Thunder 4500 T4510-04 Car Subwoofer

1 Answer

YEs i have a Kenwood X592.And my subwoofers only beat when the tuner is on.when i place a cd or my jump drive in all it does is play the music.the subs dont work

you have the remote amplifier turn on wire hooked up wrong. The power antenna goes off when the radio does... so it will lose power when you put in a cd or go to aux.
install the blue wire labled AMP. or REM.
Problem solved.

Dec 24, 2008 | Car Speakers & Subwoofers

1 Answer

Subs not hitting

remote wire turning on amplifier?
Ground for amplifier?
Gain improperly set?
Radio output crossed over above tuning freq. of enclosure?
Just suggestions. Not much info to go by.

Dec 15, 2008 | Jensen BP212 Car Subwoofer

1 Answer

Low output on subwoofers

You may have wired the sub backwards or it could be only somehow hooked into one channel instead of 2. I think this is a wiring problem.

Wires on SUB - Make sure they are connected correctly
RCA leads to AMP

Feb 13, 2008 | Car Speakers & Subwoofers

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