It's probably been posted elsewhere, but I would like to know once again why the NVA designs are as they are - perspex (?) casings instead of aluminium, copper or sheet steel (I think I sort-of know the answer to that one, but some friendly explanations wouldn't go amiss please). Also, a bit more on the cube speakers and why the design is the way it is as against more traditional approaches. I'm not baiting, just genuinely interested - gawd, I owned and supported 'Briks years ago