Cambridge Audio azur 851D Quick Start Manual page 13

The diagrams below shows the 851D in Pre-Amp mode, connected to
section of the manual.
Note: When connecting to an 851W, Unbalanced connection can also be
used, if preferred.
851D
851W
851D
851W
azur
Control Bus is the recommended method when using the 851D and
other Cambridge Audio equipment with Control Bus In/Out.
Trigger Out can be useful if the 851D is desired to control other
equipment that features trigger connections (Custom install and/or
851D
9