Question about MTX Thunder 8302 Car Audio Amplifier

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Cant figure out my car audio problems!!!!!

Just re-installed my MTX thunder 8302, and rockford p2..HELP!!!?
Ok, So ive had my system for years,in a couple of different cars. I originally had a rockford punch amp, and a earthquake 10 inch sub in my focus, blew the earthquake sub, went out and bought a rockford p2, worked great. One day my head unit cut out, and i blew my fuse for the headunit(faulty wiring). Replaced fuse, and got the hu working, sub and amp came on, but no signal coming throught the sub. Then bought my mtx amp,thinking it was an amp problem hooked it up, turns on, but still no signal. I then was told by crutchfield, that they would recommend a 4g wiring kit(which i only had an 8) Just rewired the whole car with a scoshe 4g complete kit(rcas,ground,power,remote,etc), amp still comes on, but still no signal through the sub. I checked the sub, by hooking up to my home stereo, and did the battery test to the terminals..sub seems good. Could it be my HU's rcas are blown?Just checked all of my wires, even had another head unit, hooked that up, still nothing, only a faint,rumbling from the sub(not to the music)

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There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

Posted on May 04, 2008

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