That's the newer stereo version, then (2 channels to four speaker outputs).
I've never replaced one of those relays, never saw a defective one, but I'm sure I can find
a good used original one if you need.
Are you sure that relay is bad ?
Can you tell us, what are the symptoms of the Beomaster ?
Also, please check that part no again.
My manual gives part no 7600061 for the relay on board 11.
Martin