last question before i buy all the stuff for new system. so far it looks at 2 DD 1508's with CF caps, and hopefully a DD M3, ill be running 1k to each sub. what size box should i have and what frequency? ive had a box at 28hz and another box at 34 hz. the 28 was too low and the 34 was just ok... i want some lows but i also want highs. what would be a good size and freq? 40hz?