Hi Barry,
Have you tried pairing the B2 and the MR1's, it may work with the software version you have now. If not an upgrade to B2B might be necessary.
On the B2 unit - use the front control to go to Settings and select 'Scan Bluetooth' - make sure the MR1's are in discover mode i.e. the blue LED is flashing. If the B2 discovers the MR1's the B2's display will show Ruark MR1 (and any other Bluetooth devices in the area). Select MR1 on the B2 (press and release the control) and it will try to pair - when connected the display will show 'Bluetooth OK'.
If pairing fails - use the front control to go to Settings > Maintenance > Reset Bluetooth and repeat the above.
The B2 should automatically detect that the MR1's are speakers are switch to 'output' mode (send music from the B2 to the MR1's) Please note that the Bluetooth out from the B2 is at a fixed level and you will need to use the volume control on the MR1's.
Paul
Brennan Support.