My JL Audio sub is dead. What exactly happened?

So at my wife's request, I hooked up a Roku to my main system. Roku is a device for internet streaming movies and tv. The connection between the Roku and my preamp, a Meridian G68, was a 12 foot optical cable.

The first night, I hook up the Roku and it works perfectly.

The next night, I move some cables around, then I hook up the Roku again, exactly the same way as the previous evening. I get picture but no sound. Weird. I pondering what I might have done wrong when out of the speakers... POP. POP! POP!!!

Uh oh.

I dive for the amps, switch them off. The POPs stop immediately. But...

Now there's a TERRIFYING HIGH PITCHED PULSATING NOISE coming from somewhere in the room. I finally realize it's coming from the sub, a JL Audio Fathom 113. I dart across the room, switch it off.

I stand frozen, savoring the final moments of the fantasy that maybe things aren't that bad.

Here are some questions in no particular order...

1. I suspect the amp in the sub is fried. Does that sound right?

2. Where did those POPs come from? Could a damaged optical cable do it? Or maybe the optical cable wasn't fully seated?

3. Do I really have to ship this 150 pound sub to Florida? Or do you think there's any chance of finding someone local to fix it? (I'm in L.A.) The sub is out of warranty, btw.

4. I tried to take the panel off the rear of the amp (I know, lethal voltages inside) with the thought that maybe I would just bring the amp portion of the sub to someone local to fix. I removed about 12 screws from the rear panel and still it doesn't budge. Why can't I open this thing?

If you have any suggestions, I'm all ears. If not, thanks for reading.


P.S. The rest of the system appears to be fine.
Same problem here. I purchased a Fathom F113 subwoofer from Cherry Creek Audio in Denver Colorado. The subwoofer made this noise as soon as plugged in and turned on. No input cables attached.

Cherry Creek audio said that it was a blown amplifier in the subwoofer and they offered to fix it - FOR A FEE! And I would have to pack up the 130lbs. sub and bring it back to the shop for repairs. Shouldn't it be covered by warranty? I returned the subwoofer to Cherry Creek Audio and picked up a F112 instead. Never got to hear the F113 in my system but am happy with the F112.

I do not recommend purchasing anything from Cherry Creek Audio in Denver - terrible customer service.

Here is a recording of the sound that the broken sub made:
Sorry to hear about your experience, Rob. Like you, I now have a new JL Audio sub. I replaced my F113 with a F110. Hopefully this one won't blow up.

I've been given a quote to repair my F113 by JL's factory approved Los Angeles technicians... $1000. Ouch. It's still sitting at their shop, as I haven't made a decision about whether to repair.

Bryon - did the JL repair shop in LA tell you what needs to be fixed and/or replaced?
Byroncunningham's adventure here illustrates one advantage of using a separate subwoofer amp that goes on a shelf like your other components: no scary surgery or huge shipping cost required if the amp has a problem.