because my bass box (27L) consists of 20mm coated chipboard I thought some braxpaste products or something similar to lubricate on the housing walls…(from the inside of course*g*) the chipboard is really densely pressed for a chipboard, so one nets the immediately crumbs when you process it… and it is just white coated. very hard layer. it is also sealed and glued with acrylic on all edges as well as doweled. stable box simple. and half-cooked stuffed with sonofil. you knock against the tinkling it also listens a bit “holy”, so it’s somehow not acoustically dead… nevertheless the bass seems a bit horny in some songs. not that the suspected comes up I’m not satisfied with the combi, with other songs he is completely awesome. have never heard an installation where you could put in music what you wanted and the bass was always perfect… can you say that from yours??? he is currently separated at 63hz with 24db flanke. I tried a lot about separation but the perfect bass isn’t yet… I also somehow feel like some pieces are really bad, how can I say, mixed, extra drone bass including so in this direction… hope you understand what I mean!? well, anyway, can I get something from brushing the walls? (by the way, yesterday from 7893R to 9835R I swirled and was really surprised because there was a rather big tonalichen clearly audible jump forward as I would not have suspected)