Anyone who can clarify this topic?
Wait until Steve at Sounds Heavenly’s site (sponsor at foot of page) is open and I think he can help – from memory he supplies attenuated cables for just that purpose.
Would a MCL2AV help?
MCL2AV is designed for a link room and would be conected to the BM3300 Spkr 2 sockets. You could connect Beolabs to it’s Powerlink sockets in a link room. If you tired to use an MCL2AV in the same room as the BM3300 you would not be able to control volume fully via the front panel. Better to use a solution from Steve to attenuate the spkr 1 socket output.