Yes that 28wpc MasterSound does an awesome job on the Heco Direkts, fast, sweet & punchy with lots of texture, the sound is just effortless.

The dims for the Hecos are 48" x 31" x 13" (h,w,d), luckily I'm single don't think they're exactly wife friendly.

Yes it is beautiful in the flesh, it's 6 sided, with only the front LH corner being 90⁰. 

Paul Knipe the artisan woodworker who owns Solid Sounds and built it, said it was a pig to clad due to all the weird angles. I was heavily involved in the design, much to his chagrin, I think he was getting fed up with me keep calling with, or sending in sketched amendments/ideas.