Panel Descriptions
Rear Panel
REC OUT
INPUT 4
R
L
CLASS 2 WIRING ACCEPTABLE
24V DC IN
OUTPUT
COM
4
8 25V 70V
+
–
INPUT 1
LINE PP MIC
MUTE SEND
ON OFF
PP
MIC
+
PHANTOM
POWER
INPUT 2
LINE PP MIC
INPUT 3
LINE PP MIC
TEL IN
LEVEL
0 10
5
6
7
6. External DC Supply Input
Connections for an external 24V DC supply to
power the amplifier.
7. Speaker Outputs
Output terminals for connection to either 70V,
25V, or low-impedance speaker types.
8. TEL Input
This is a dedicated transformer-isolated TEL input
with input level control. This input will mute all other
inputs when active.
9. Mute Send
The ability of Input 1 to mute Inputs 2, 3, and 4
can be enabled or disabled using this switch.
10. Input 1- Balanced LINE/MIC
Input 1 will provide an electronically-balanced
input with selectable gain suitable for line-
level signals, including dry loop telephone
signals as well as balanced low-impedance micro-
phones. The associated slide switch sets the
input for LINE, MIC or PP (MIC with phantom
power). This input can be set to mute Inputs 2,
3 & 4 when active. This input is always muted
by the TEL Input.
11. Inputs 2 & 3 - Balanced LINE/MIC
Inputs 2 and 3 will provide an electronically-
balanced input with selectable gain suitable for
line-level signals, including dry loop telephone
signals as well as balanced low-impedance micro-
phones. The associated slide switch sets the
input for LINE, MIC or PP (MIC with phantom
power). These inputs are muted by Input 1 when
muting is enabled. These inputs are always
muted by the TEL Input.
12. Input 4 - Unbalanced AUX
Provides a high-impedance input through a
set of stereo combining RCA jacks. This input
is always muted by Input 1 when muting is
enabled.
13. REC Output
These RCA connectors provide a signal-level
output of the program material provided to the
speaker.
14. AC Mains
AC mains voltage will be provided through an
IEC connector with fuse holder and detachable
3-conduction IEC cord. The nominal line voltage
is 120V AC, 60 Hz.
12
13
14
9
10
11
8
