Question about Jl Audio 250/1 Car Audio Amplifier

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??Confused and angry!

I have a JL 1200A mono amp and has been working fine- today i was cleaning up the wiring mess i had. well i had disconnected the RCA's that go to the amp and had just finish tightining the ground wire... i pluged the rca's back in but accidently placed them into the pre-outs instead of the Ch1. Ch2. - redlight flashed... i tried just correcting the rcas i have a green light... but no bump from the subs... Plz help!

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Re: ??Confused and angry!

Try hooking an mp3 player or some other source into the amp (in place of your car stereo)while the car is running to test it. You may have damaged the output of the radio. If not report the results here.

Posted on Sep 15, 2007

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It could be a number of things? 1 to many subs, speakers wired to the amp causing it to overheat and making the thermal light come on. 2 It all depends were your amp is. If it's clear and nothing covering it, obstructing it, Ie sub in front of it, amp inbetween the rear seats and sub.

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your subwoofer is wired incorrectly to your amplifier. Figure out which ohm load of subs you have and then what ohm load options your amp is stable at. Next go to either the Crutchfield website. find their learning center. go to subwoofer wiring diagrams. or go to and find their section on it

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If what you're telling me is correct you're trying to drive a stereo sub -woofer with a mono amplifier. If so, that could be a bad situation for the amp, if the voice coils are not wired together correctly. Before we go too far, I have some questions I need answered.
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2. Do you have the 4 terminals of sub-woofer tied together. For example the 2 positive terminals are tied together & the 2 negative terminals are tied together?
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While I'm waiting to hear back from you, I'll try to draw a schematic (wiring diagram) of the way it should be wired for your particular setup that I'll send to you.

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sounds like they have your sub amp in mono but they put the speakers in series which totally cancels the benefit of running your amp in mono. you will probably be happier if you just hook the left speaker to left plus and minus and the right to right plus and minus. Cuz even though subs aren't directional they do pass some higher frequencies that are and that dilutes the stereo effect.

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