I recently installed an amp/sub combo in my friends Durango
It sounded great, and hit how it should until yesterday. It got a lot quieter, and you must turn the head unit up higher to even hear the subwoofer. I adjusted the gain, and equalizer on the headunit. Checked all grounds, because he claimed it did the typical bumping and snapping noise the night this happend. Did he happen to smoke a Voice coil? It was a Cerwin Vega Vmax D2.
Thanks for any help.

Only way to test the sub is with a multimeter. Check the impedance you can tell if the voice coil is messed up.

true, guess we will have to get to that then
any other opinions? It is just weird that it suddenly got quieter

Check all your connections. I had that happen twice, once the wire connecting to the sub was coming off and so i had to turn it up loud to get it to "cross the gap" per say.
The other time one side of the RCA to my amp came out so I was only running the sub in mono, not stereo. Made a huge difference when I plugged it back in.

-Seth

figured that is the problem, because it made the clicking noise before it went, and that is the sound a sub will do when it deals with ground or rca's . I will check that out