ok, i have (2) 15" Kicker L7's, the 2006 models in a dual slot ported box, each sub in its own chamber and each sub powered by its own 1700 watt kenwood amp... they are not hitting even CLOSE to what they should be... any ideas? is my box maybe too small or something? and can someone tell me what the correct size should be for this setup... thanks in advance, l8r