Hey guys- I went from 122L sealed to 200L (19hz) ported with my Tempest. I'm running a PE250 (no boost). I heavily braced the new box and used a 6in straight pipe (sched. 40 PVC). I also used about 3 lbs of stuffing. I listen to alot of music and maybe this wasn't the best idea. The sub seems a great deal slower. The quality of the bass just isn't there anymore. It does play a lot louder from 25hz and down but I really miss the detail and speed of the sealed box. The two set-ups used the same location, same material, same amp, same everything. I've eq'ed the sub to knock out any peaks. Even then the sub just sounds slow and bloated in the lower octaves. Has anyone had similar results when going ported? I'm now considering just keeping the sealed box and running arounnd 520w of clean power via a Yammie M-85 solid state power amp...or... should I try to tweak the ported design?