The Beolink Converter 1611 would not be any help in this setup.ย Masterlink audio connections need to be activated and controlled by B&O equipment at the โreceivingโ end of the connection.
I assume that the BS4 and Denon amp are in the same room and that the BS4 has no other speakers connected?
I can see two options:
Use Masterlink to connect the BS4 to a Beolink Active 1636 (and IR sensor โ the โhockey puckโ type) co-located with the Denon amp.ย Then use a cable like this to connect the BL Activeโs Powerlink output to the Denon ampโs aux input.ย If the BS4 and Denon amp are in the same room, put the BS4 in A.OPT 0 and remote control it through the BL Activeโs IR sensor.ย You will have a double volume control situation, able to control volume with either the B&O remote or the Denon amp (but not via the volume buttons on the BS4).
Re-purpose the wires in the masterlink cable either:
To connect the BS4โs aux output to the Denonโs input.ย Aux output is fixed volume hence volume control would only be via the Denon.
To connect the BS4โs Powerlink output to the Denon amp.
Original B&O masterlink cables are wired as in the following diagram, so you could chose appropriate wires and solder your own connections:
(EDIT:ย Unable to load image for some reason, hence added as attachement)