A DIVISION OF LEAR SIEGLER, INC.
AMPLIFIERS
Models
CT 35/60/100
Bogen
Acousta-Master@
CT Series Public Address
Amplifiers are versatile, silicon-transistor preamp-mixer-
amplifiers designed for professional-quality sound reinforce-
ment requirements. Model CT-35 is rated at 35 watts,
Model CT-60 at 60 watts and CT-100 at 100 watts output.
Four high-impedance microphone inputs are provided,
each convertible for use with low-impedance microphones.
A simple modification converts inputs to low-impedance
unbalanced; balanced inputs require accessory plug-in
transformers. Two mic inputs and one auxiliary input may
be remotely controlled or muted for announcements over
another mic channel. The same two mic inputs may be con-
verted to accept a magnetic source, i.e., turntable or tape
player. Two auxiliary inputs with fader control are pro-
vided, as well as a bridging input.
Acousta-Master
amplifiers feature the Bogen built-in
acoustic equalizer filter circuit, which provides a means of
boosting or attenuating any of five selected frequencies to
suit individual room acoustics. An electronic limiter circuit
provides uniform output regardless of wide variations in the
input level. With this capability, all paging calls can be
transmitted with the same volume and clarity.
An output terminal strip and connectors at the rear of
the amplifier provide standard speaker impedance taps, as
well as connections for 25volt or 70-volt balanced lines.
There is also a bridging output for feeding a tape recorder.
Bogen accessories provide the amplifier with telephone
line input and output connections, remote volume control,
and channel override facilities. Further information is
contained in the Accessories section.
The amplifier operates from a 105-125 volt, 50/60 Hz
source. A three-prong line cord provides automatic ground-
ing when connected to a three-wire power outlet. The
power line is protected by a circuit breaker, and the output
transistors by a thermal overload device, which shuts off
the unit when the temperature of the heat sink rises
excessively.
INSTALLATION
UNPACKING
The amplifier was carefully checked before leaving
factory. Inspect shipping container and unit carefully for
indications of improper handling. If the unit has been
damaged, make an immediate claim to distributor from
whom it was purchased. If the amplifier was shipped to
you, notify transportation company without delay and
place your claim.
POWER AND GROUNDING
The ac line cord has a three-prong plug which should be
plugged into a three-wire grounded, 120 volt, 60 Hz outlet.
As it is important to ground the amplifier, where a three-
wire outlet is not available, use an adapter (e.g., Leviton
No. 5017) and connect the grounding pigtail to the screw
securing the wall plate. If the wall plate screw is not ground-
ed, connect a wire from the GND terminal of the amplifier
to a suitable ground.
AUXILIARY POWER
The auxiliary power receptacle on the rear chassis (see
figure 1) is a three-wire grounded outlet, which can supply
power to accessory sound equipment. When connecting
associated equipment with a three-prong cord, appropriate
grounding is accomplished when the amplifier line cord is
properly grounded.
Use the ON/OFF switch on the phonograph for turning
off a record player connected to the auxiliary receptacle, as
use of the amplifier power switch could cause flats to
develop on the idler wheel of the phonograph.
Be sure that the auxiliary components do
not draw more than 250 watts on the CT35
and CT 60, and 500 watts on the CT1 00.
Prmted i
n
USA 8104 54-5629-l 4
