20 Most Recent Jl Audio 12W7 Car Subwoofer - Page 6 Questions & Answers

Hi rodneybarton The problem of your unit may be its amplifier. You need to open the box and inside of it, there is a component that attached on the heatsink you need to replace that one. or better send your unit to qualified technician.

rca inputs are bad

No idea to be honest try it and see its not difficult to access

Check for a speaker wire that come come of , Or a loose grond wire on the amp or where ever you have the ground wire connected two,

most replacement parts can be found on ebay such as the refoam kit for the w7 an the center dome cover.

Hi, Most car amps run on 4 ohm or 8 ohm. Don't use larger ohm rated speakers on your system you can damage your amp. Also check that speakers are connected properly + to + and - to - (polarity is wrong) check wires for shorts or grounding too. Good luck

The most likely solution is that your voltage is dropping too much and the amp is going into protect mode to save itself because of the lack of power. Double check fuses in the amp first and then on the power cable and third make sure all the connections are solid, i.e. ground and power wire. Another thing might be to check that you didn't switch the polarity by connecting negative and positive wires to their opposites.