I've got a Polk MM 15". I've only had it for a few months. It's in a sealed 1.9^3 and it sounds great! I've got the box and everything for it still. I've been powering it with a 2 channel Pioneer at around 380 bridged. I'd just like a little more output. Do these do well sealed or ported?anyone?? offers? id like to move these this weekend