Critical MAss UL-12 Box hav u seen it?

[Malcolmi]

I am looking for the spacing in between the ribs. Can anyone help?

[Pioneer~Saturn]

Well you could probably find out by looking at the manual for the sub and looking for the measurements to see how much space is needed to get to the point on the woofer where 'x' will clear the basket/motor...or measure the woofer by hand and simply dry-fit the woofer in the enclosure (partially made, to allow you to easily take in+out the ribs and move them to where you want them for mounting) to take a look at how much clearance you have at guestimated spacing...