What kind of filling should I use with 2 of these MBM 12LX: https://www.diysoundgroup.com/bundles/midbass-modules/mbm-12lx-kit.html Here is the flat pack for these as well: https://www.diysoundgroup.com/bundles/midbass-modules/mbm-12-flat-pack.html Should I use denim insulation, poly fill or eggcrate foam like this? http://www.usafoam.com/acousticfoam/eggcratefoam.html Will adding the denim insulation mess with the size of the box. I mean will the box seem smaller for the tuning the port?
