James, could you tell why Bryston never built a 3-way stereo XO? Wouldn't there be a market for it? I know the 10B can be transformed into a mono 3-way unit but you only have 24dB slopes available this way and I like the possibility of using asymmetric slopes.
A stereo 3-way XO with 6/12/18/24 slopes, 0°, 90°, 180° or 270° phase selector (as you have in subs) to compensate for the phase shift induced by the selected slope and adjustable Q would be nice. If there would be no room in the box for the XO circuitry and PSU, it could be used the external MPS2.