how safe will i be if i over power the mj-18 by 200wrms? if i cant do that how much is safe to do? thanks

There is no need to make multiple threads on the same topic.

It will be fine as long as you set your gains correctly, a little headroom is ok.

nG

Apparently you haven't read my threads, but I had a pair of MJ18's in 3.25cf each running off an Earthquake PH-D3.

That's 1000 watts RMS per sub.

They handle it fine in that box.

Stick to 600 watts RMS because they wont get much louder past that, just run hotter.

Oh yeah, if you're thinking about grabbing the US Acoustics 800f on eBay, do it, it's a great amp and the headroom will be good.

I replyed in the other topic, just be smart with the gains and you should be fine.