I don't have any idea what caused this. does anyone have any ideas. it was a sony sa-wm40 12" sub. I have had it for about a year and a half.

Your amplifier probably just just went.

you could have had a big power surge I guess or as gotapex said your amp could have just failed

Sorry to hear about the death of your sub!

Does anyone still sell this model? I'd love to have.. another one myself! any idea where to get a "working" one?

Sonicflood

You know, the DLS 10" from Parts Express is an excellent choice. A few people have compared the older DLS quite favorably to the WM40 and the new one should be better.

I was just about to ask for some recommendations for a new affordable sub. thanks. if anyone has any suggestions I'll gladly accept them.