Hey everyone! I've been browsing these forums for awhile now getting as much info as I can, but now it's time for me to start asking some questions. I'm currently building a tempest sub enclosure out of 3/4" MDF, as many people are. I can afford the space to make a larger enclosure, as my current design is a 276.5L with 2x 3.5" ports tuned to 20HZ. I'm using the SUB250R amp from Creative Sound Canada to power it. My use for it will be 50/50 music and HT. 1: I recently read though that building a sub of this size for a tempest driver will cause it to lack "punch". Is this true? I wanted to try to steer clear of the Adire plans, because I wanted to make a unique looking cabinet, and I didn't know what kind of effect the changes would have on Adire's alignments. Should I make it smaller? 2: should I use polyfill in the enclosure? I get the impression that it is best used in small cabinets. Would there be any advantages to using it in a box this size? 3: I may make my own port flares, as store bought ones may not look good with this box. Flares confuse me a little though. If WinISD tells me I need 2x 12.12" ports, does that include the flare or not? what kind of radius should the flares have compared to port diameter? And will the flare length and radius affect the tuning or just vent noise? Basically I don't know the math involved in making a great vent. I may have a few questions later, but I really appreciate any help I can get. Thanks guys!