The cabinet is made according to a principle called a terminated line. I have also build this speaker in a bass-reflex box with a net volume of approx. This speaker sounded very analytical in the low freqencies but not as nice as the terminated line, it lacked a bit of natural warmth. The terminated line which i called Transient II, has a much warmer and still very analytical bass performance. The mid is up-front but it also gives, together with the high, a lot of spaciousness.
Transient performance is good.
The tweeter gives a little too much at the end of the spectrum which gives the system, when used with certain electronics, a bit of bright, 'harsh' sound. The drawing, said wool but the BAF is easier to use because it stays in place and do not settle like the wool. The other material called 'Pritex' is a brand name. It's a kind of synthetic foam with an egg shape, it weights about 30 kg a cubic meter and has a height of about 40mm. If you have any questions or remarks i will be pleased to reply on them.