I posted a thread before but the measurements were wrong i forgot to subtract the thickness of the wood. Actual measurements w/o port are: 15.5"H x 38.75"W x 32.5"L. Port is: 6"W x 32.5"L x 15.5"D. I have 4 Orion P Series 15d4 i do not remember the T/S Parameters but they can be found at www.orioncaraudio.com. Thank you for any help. And hell if someone could just give me a formula i could probably find somwhere around the tuning but i do not know where to begin. So please help.