4
Description
Bogen Models C
1
0 and C20 public address amplifiers are rated at
1
0 and 20 watts, respectively, and are listed to
UL Standard 60065 for US and Canada.
The amplifiers accommodate low-impedance microphones and high-impedance auxiliary sources. A front panel
selector switch offers a choice of either two low-impedance balanced microphones (MIC
1
, MIC2), or one micro-
phone and one auxiliary input (MIC
1,
AUX). The AUX input can be muted when a customer-supplied SPST nor-
mally open switch is used for microphone precedence. Independent volume controls and a treble control, for tonal
balance, are provided.
Balanced and unbalanced outputs are provided for 4-, 8-, and
1
6-ohm speakers and for 25- and 70-volt constant
voltage systems. An accessory transformer, Bogen Model WMT
1
A, can be installed to provide input- and output-
matching to a telephone line.
The amplifiers operate from a
1
20~, 60Hz source. A thermostat enclosed in the power transformer protects the
unit against overloads.
The amplifier also accommodates a transformer-balanced TEL/page input with VOX detector for muting the AUX.
Front Panel
1
. MIC2/AUX Mode Switch
Switch selects either the MIC2 or AUX connection as the active input.
2. MIC
1
Level Control
Individual level control for dedicated microphone input.
3. MIC2/AUX Level Control
Individual level control for a dedicated microphone input or for an auxiliary input depending on input mode selected.
4. Treble Control
Controls the amount of attenuation to treble frequencies above
1
0 kHz.
5. Power
AC Power switch. Illuminates when ON.
