okay, i bought 2 12" RE SEs and i have them in a 1.3 Cu. Ft. per chamber box. i like the sq of the sealed but i want a little more spl....would building a bigger sealed box give me more spl and keep the sq or should i just go ahead and build a 4 cu. ft. ported to 30 hz....the same plans that are on the RE site.........i just want some suggestions