I'm currently trying to design an enclosure for 3 Bl 10's i've got 1.85cu.ft of volume (total), with displacement. What sort of port area and length would i be looking at.

Also, i can increase the volume slightly, as that is with 1inch MDF

winisd.......but i dont think thats going to be enough airspace for what you are trying to do. may work better with just two tens?

I'm currently trying to design an enclosure for 3 Bl 10's i've got 1.85cu.ft of volume (total), with displacement. What sort of port area and length would i be looking at.

Also, i can increase the volume slightly, as that is with 1inch MDF

Have you already subtracted driver displacement?

yeah, been playing with it abit. Got about 2.1 cu.ft for volume now, and yes, it's with driver displacement

what are your max dimensions?

it's for a slanted box. 34.25 W 18 H 9.5 Top D 13.75 Bottom Depth

12-16 sq.in. of port area per cubic ft. of volume... so around 24-32 sq. in. on your port area and make sure you keep the port length to width under 9:1 so your first measurement on your port would be 16 height if you run the port the height of the box subtracting 1 inch for your bottom plate and 1 inch for your top plate.....and your port width should be 1.5 to 2 inches wide, if calculated by the 16 inch tall port, (port area=port height x port width) depending on how much area you decide to go with, and the length will depend on your tuning frequency...hope this helps.