Resolution Opus 21 Owner's Manual page 7

1
Press to mute/un-mute the output. The volume level display will flash when muted.
2
Press to select input 1, balanced (XLR).
3
Press to select input 2, unbalanced (RCA).
4
Press to select input 3, unbalanced (RCA).
RS-232 Input - DB9 female
5
For automated systems, connect to serial controller (listen-only).
Opus PowerLink connection - 4 pin XLR male connector
6
Connect only to Opus 21 Power Centre using supplied cable.
Speaker Output Left - Binding Post (optional)
7
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.
Speaker Output Left - 4mm Banana
8
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.
Speaker Output Right - Binding Post (optional)
9
Designed for cables with spade lugs. Observe polarity (+/-) markings on the top of the connector.
Speaker Output Right - 4mm Banana
10
Observe polarity (red +, blue -). Connect the center (yellow) jack to loudspeaker ground if available.
Analog input 1 - XLR female connector, pin 2 non-inverting, pin 3 inverting
11
Connect to balanced source. 20 Vrms maximum, 20 kOhm input impedance (10 kOhm per phase).
Analog input 2 - RCA connector
12
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.
Analog input 3 - RCA connector
13
Connect to unbalanced source. 10 Vrms maximum, 10 kOhm input impedance.