Doesn't the answer lie in the capability of the amplifier as it relates to the specs of all the speakers being driven?
I know Linn products are well received and for good reason, nevertheless, I would recommend reading the manuals for your amp and speakers to determine if the amp has the capability of driving both speaker pairs simultaneously.
Glenfihi and Jax2, did you use the Bryston selector box to run multiple sets of speakers simultaneously or to switch between sets running only one set at a time?
I know Linn products are well received and for good reason, nevertheless, I would recommend reading the manuals for your amp and speakers to determine if the amp has the capability of driving both speaker pairs simultaneously.
Glenfihi and Jax2, did you use the Bryston selector box to run multiple sets of speakers simultaneously or to switch between sets running only one set at a time?