i want to go with a ported box in order for the sub to get a little louder.. i'll be getting the new flat cone edk.... i've read that you need a subsonic filter on the amplifier if you use a ported enclosure.... i was lookin at a profile amp to power it, but it doesn't have a subsonic filter.... ive searched in this section and i haven't got an answer... i want an amp that would power the edk, prolly around 400 watts, but which also has a subsonic filter.... unless i don't need one at all... any comments are appreciated.