20 Most Recent Jl Audio 300/4 Car Audio Amplifier Questions & Answers


Internal amp short on that channel. Repair or replace.

Jl Audio 300/4... | Answered on Oct 11, 2017


The power transistors are shorted out and must be replaced. If you contact JL they will fix it for a flat rate. That amp is well worth it.

Jl Audio 300/4... | Answered on Sep 04, 2013


Depending on what light it is. It could be your ohm light, if it is your ohm light then you have something wired incorrectly. If it is another light, it could either be a power problem or it could be that your amp is damaged.If you would like, you may e-mail me and u can let me know which light is on. It SHOULD say right next to the light; which light is on. E-mail me at [email protected] and I will respond to you as soon as i recieve it.

Jl Audio 300/4... | Answered on Mar 08, 2013


No. JL is one if not the only manufacturer that does not fuse there amps.

Jl Audio 300/4... | Answered on Feb 18, 2013


This can happen if the amp has an internal fault such as a shorted output transistor.

Jl Audio 300/4... | Answered on Dec 18, 2012


Do you get the yellow light with or without speakers and rca's connected?

Jl Audio 300/4... | Answered on Aug 13, 2012


Does it only happen on that channel. It is a 4 channel amp so make sure the other channels are working. It sounds like an RCA input prob. Try the sub on the other channel. if it works then it would be your RCA input needs resoldered.

Jl Audio 300/4... | Answered on Sep 08, 2011


Had the same problem once from a very poor ground connection.

showed 12V across multimeter, but could not deliver any real power across the connection due to poor grounding.

check it.

Jl Audio 300/4... | Answered on May 09, 2011


check how secure your earth strap is for the amp, mabye try thicker cable, you can get interference suppressors as well which may help and are cheap.

Jl Audio 300/4... | Answered on May 03, 2011


Hi
It look like you burned the power supply in the amp if the fuse is ok
there is a circuit that protect the amp and its possible that it burned
this should not be too expensive to be fixed
[email protected]

Jack

Jl Audio 300/4... | Answered on Oct 19, 2010


Depending on the amplifier it has an allen key that fits the input and the speaker wires. Any hardware store will have the tool that will fit. Most of them will allow you to take it outside and test it on your amp to make sure it fits.

Jl Audio 300/4... | Answered on Aug 08, 2010

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