I sent this email on July 26 to Bryston service (  
[email protected] ) but have yet to hear back from them.
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Bryston Service, 
I own a very old 10B crossover s/n 100273 and on the back for the mode switch it has three options namely: 
2 way stereo
3 way mono
2 way mono 
The "newer" 10Bs according to the online manual have these three modes 
2 way stereo
3 way mono
Stereo HP / Mono LP 
I want to use one sub vs two (my current configuration) so is there a way to get my 10B cross over updated so that the Stereo HP / Mono LP mode is available?  If so what will the cost be?  I could personally drop off the 10B at your Etobicoke location.  I did this previously when I got my SP 1.7 updated. 
Thanks  
Eric Chong 
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In the past Bryston responded fairly quickly.  Usually I would be more patient but I'm leaving town and wanted to get this done sooner vs later.  Guess it will have to wait till I get back next week.  In the meantime, is this doable?