Resolution Audio Opus 21 - Manual (Page 7)

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