I know this is an old thread but since I just got the B6s not too long ago and plan to do the Level 1 mod I had one nutty idea re the cabinet resonances I read about in the Stereophile review and acknowledged here by AJ - the most prominent being a high-Q 188Hz bad boy measured "everywhere" but strongest at the centers of the side walls. There were some lesser resonances found above 188Hz and all tolled, when listening to a particular music selection, the reviewer described the B6 cabinets as "vibrating like a sex toy". So what about this idea. Go to your local home improvement or flooring place and buy some single pieces of ceramic tile, have those cut so as to almost cover the sides and top areas - leaving a small, un-tiled border so without precise fitting, edges don't butt and no overhangs. I'm naively thinking that one need not cover ALL the side and top acreage but a good part of it to load those panels down on the outside. Depending on the tile pattern, the final "look" would be "different" for sure. For an adhesive you want near-100% coverage for intimate coupling between the roughed-up vinyl exterior and the tile. You also want something that's going to dry sometime this year w/o the benefit of air exposure and not attack the vinyl. I'm not in-love with anything I've seen on the shelf (i.e. caulk gun products) that can meet those requirements except a whole lot of expensive epoxy - ideal because it cures w/o an atmosphere.
So I'll leave it hanging there. Is this foolish DIY fun? Will it work or will these resonances somehow simply migrate to new frequencies?