JL Audio f112 blown speaker?


I have/had a JL Audio f112 and I absolutely love it. About 3 months ago I changed my processor from a B&K Ref 50 to the new Classe SSP800.

About a month later my f112 started, for lack of a better term, started screeching, when I would play it. I have no idea what happend, but I unhooked the XLR connection and it would continue sporatically, even without any signal.

JL Audio was absolutely great. I sent it in and 5 days later a new one shows up at my door. Now after a month the same thing has happened with my new one.

I'm not playing them loud at all. I play video games, watch movies and listen to a lot of music.

Something is up and I am clueless what it is. It must be something in my system causing this. Any suggestions?
rshad0000
This is an amplifier problem or power supply problem in your sub. This is not good - especially if two units have done this. Perhaps JL have developed a QC problem with some parts they are using. Alternatively, if your Classe has a fault perhaps a high level DC or transients are reaching the XLR input on your sub and damaging the input buffers by over driving them. If your XLR cables are wired correctly none of the three wires should be connected to the connector or shield and all three lines should be isolated from eachother.
Make sure the connectors of your cables aren't touching adjoining cables on the back of your processor. Make sure your connectors aren't loose on your cables.
Thanks guys. This is all good advice and I will give it a try.

To answer your questions...

I have the cross over on my center and surrounds set at 80hertz and my L/R set at 60hertz; plus the LFE going to the sub.

I only have the volume set to a little under halfway.

My guess is the games are just driving it really hard and compounding whatever problem I have.
Also...I have the sub, speakers, amps, processor and TV all on one circuit. I know, not ideal at all, but my room layout doesn't permit much else.
Put your sub on an seperate circuit if you can.Try using a heavy duty extension cord and run the sub to a different outlet away from the rest.The JL's have a limiter of sorts built into it. I found it running test tones thru it, didn't damage it at all and I found the absolute max I can drive the Fathom to. Did you calibrate the sub using test tones to the recommeneded 75 db setting?