Alright so i've done a lot of measuremeants and i'm pretty sure i can easily fit in an BL 18. How well do they work in a box around 5.7 cubes before displacements. Also i need some help figuring port size. I'm going to have to have sub up but where should port be and size. Height is 17" to any obstruction, 36" width and about 28" long. Any ideas for box??? or should i just settle for a 15. Its going to have a US amps XT2000d on it and i'll get cooling.

Thanks,

Austin

I think after displacement you'll have closer to 4ft^3 (port:>1.5ft, sub .3ft, bracing=closer to 2 ft^3, leaving more like 3.7ft), maybe even a little less depeneding on tuning. If I were you I'd give that space to a 15, I think you'll have a much smoother response. You could make an 18 fit, but after displacement the minimum recommended enclosure is 5ft. My thought on it.