Summary: I have this single sub wired in parallel in a ported box 1.8cu with a Planet Audio 4000 watt amp. I had to turn the gain almost all the way down to make the bass not overpower. When I push this thing a little bit it flexes my Jeep, the mirrors rattle so hard you can't see. For the price you can't go wrong. I had it in a sealed 1cu box for a few weeks wired in series, it hit pretty hard but not as hard as the ported enclosure, but that is another review.
Summary: despite what the write up says about these subs dont let the 50hz tunning of these subs scare ya, these subs can and will get low! I am very impressed so far with these subs, now i have not hooked them up to 3,000 rms of power yet but i am giving them around 1200 rms and these subs bang! Im using a prefab box i got from attrend till i can build my own and wow is all i can really say. these subs hit clean and loud.
Summary: This thing hits hard. Been pounding it a few weeks now. takes serious power. I was a little skeptical because of the frequency range above 50hz. Honestly, I miss the lower freqs. Hard to knock the sub though because that is stated. It hits its frequency range hard and loud though. I put it in a 1.8ft^3 box and added a port. had to use a 4 inch port because I couldn't fit a 10 inch long port, am getting some port noise. I would recommend using 5 inch as recommended.