Last weekend I made up a modified MJ-18M and we decided to do some power testing using a SounDigital SD-12k. This unit has a single 1 Ohm voice coil and a couple of other mods:

The box we placed it in. Not sure what the size or tuning was as it belonged to Murilo. Perhaps he can comment on it:

First test went fairly well with 1.5kw:

Second test did better with more power:

Third test was with 11.6kw of power:

Fourth test didn't produce any more output but the FrankenMJ took quite a bit - almost 16kw(!):

That's pretty decent power for a single SD-12k amp!

thats crazy

Ya that testing session was pretty crazy. I couldnt believe it took that power. Fun Times!

Yeah, despite the crappy weather it was fun. I want to get Murilo to BassRace it now... hehehe

great numbers for a single sub and all that power, keep it up man.

what were the mods done to the MJ-18M. Thats crazy how it handled so much power.

So we did a BassRace with the same driver today. We found that 4kw was a bit too much for it. 3kw is more the happy place.

This would be a good driver to use at 139.9

I am glad to see the MJ back, and those are great numbers of an SQ 18".