Okay. There’s big speakers and there’s huge speakers, but I think Arcadian Audio’s Pnoe Horn deserves its own category (I had to publish this under “furniture” as well as “audio”, hah). After 10 years of development they’ve created a horn speaker designed to create “the smoothest, roundest path for the sound wave front, without any obstructions, so that there are no sources of standing waves and spurious reflections”. How about that now. It’s made out of shiny fibreglass (both in- and outside) with special damping materials and it uses the AER MD3B driver for “ultra detailed presentation and warm sound”.
There’s no word on pricing, but I think it’s safe to assume they’re crazy expensive.