We tried several versions of internal bracing during development but each time it reduced the internal volume and we lost bass response. In a small system this was not acceptable. After much trial (and error) we moved to a sandwhich design using stiffer high density fiber board (HDF) replaceing the medium density (MDF) from the original design, increased the wall thickness to a full 18mm, and added a rubberized layer on the inside of cabinet. This was able to damp the cabinet while only increasing the outer dimensions by 3mm. So we just solved that problem another way and the bass response thanked us for it.
Why don’t your speakers have internal bracing?
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