Picked this sub up recently.
rated at 900wrms.
have it in a ported box, 1.9 tuned to 33hz, and absolutely pounds on 500w.
it is a very musical sub.
plays all the way up to 250hz crisply.
was playing 2 step by dj UNK and i set off a few car alarms.
and at only 180 per sub, you get more than you pay for.
for someone with a decent budget, i would definitly recommend this sub.
Sound Quality: /7
Power handling: /8
Low Frequency Extension: /9
Build Quality: /10