Well as some of you guys may know I have a DIY sub with an Avalanche 15 with a PE 500w plate amp. I first had this sub in a 5.5cuft box ported to 19hz and it sounded ok but the low end was overpowering. And it really didnt seem to have alot of higher frequency bass output no matter how much power I put into it. So then I tried it in a much smaller 2.5cuft sealed box. I must say i'm much happier with it in this setup. Using the EQ on the plate amp i'm boosting it as much as possible at around 20 Hz and its fairly flat at the listening position. Has a slight hump in the middle. Upper response is MUCH much better. It sounds pretted decent to me anyway. Only complaint is that my current setup seems to run out of headroom below 30hz at higher output levels and that area starts to compress. I'm tempted to try the 1000w amp but I really dont ever want to have to worry about over excursion. So it seems like the big ported box had too much low end, small sealed box doesnt have enough. I'm not really a fan of EQing things alot anyway. I'm just wondering if I would have been better off with a 12" ported sub? Do you think that would have given me the extended upper and lower response I was hoping for?