Question about Jl Audio 300/4 Car Audio Amplifier

Can it Be Fixed

Amp was connected directly to positive and negative terminals on car battery. spark flew when positive lead was connected to positive terminal. Front channel had RCA's already connected to the receiver. Now the amp powers on, but the front channel doesn't work at all, and the rear channel is terribly distorted. - What exactly happened, can the amp be fixed, where should trouble shooting begin, and what should be looked for. Thanks.

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148 Answers

Nothing should have been damaged. I would assume the speaker output shorted in one way or another...did you have a speaker hooked up? You most likely blew the output transistors and they ALL need to be replaced as one going bad will kill the rest since they're so sensitive. At least the PSU, seemingly, wasn't damaged. Contact www.audiotekx.com, ask for Jason, he's excellent at repairing amps and has great pricing.

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Posted on Nov 02, 2006

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