Designing, producing, and selling speakers would take a very serious investment on Bryston's part. Re-tooling, factory floor space, R&D costs, etc. It could work out, but as James said, there's so many great speaker companies out there. I'm not sure that it'll be worth their time and resources to get into this end of it. I think very few non-Bryston owners would seek them out. Kind of like McIntosh, Krell, Naim, Linn, and Rega. Those companies probably do well enough in the speakers department, but it's probably more or less a break-even thing than anything else. Maybe not though, as most of them have been making speakers for a long time in relation to their electronics.
How about a turntable, James?