Bogen C10B - Manual (Page 2)

AUXILIARY POWER
S-X The auxiliary power receptacle on the rear chassis is a three-wire
grounded outlet, which can supply power to accessory or associated
equipment in the sound system. Be sure that the auxiliary
component does not draw more than 300 watts. The power switch
on the front panel of the amplifierdoes not control this receptacle.
Equipment connected to this receptacle will remain on at all times
unless turned off with its own On/Off switch.
Associated equipment connected to the auxiliary receptacle
with a three-prong line cord will be grounded, providing the
amplifier line cord has been properly grounded, as previously
described. Otherwise, it may be necessary to ground the auxiliary
equipment.
AMPLIFIER I
6ND COM 16 JL
A74-2090-0I
AMPLIFIER 2
6ND COM t6.TL
ClOB
INPUT CONNECTIONS
MICROPHONE: Connect low impedance microphones to the
input screw terminals on the rear panel. High impedance
microphones should be connected to the input jacks provided.
MICROPHONE PRECEDENCE; A built-in circuit provides
muting over the MIC 2/AUX channel. This is achieved by
connecting a customer-supplied SPST normally-open switched
microphone cable to the MIC 2/ AUX MUTE screw terminals.
AUX: To connect a turntable (with ceramic cartridge) to the AUX
jack, use a single-conductor shielded cable terminated in a
standard RCA phono plug. It is recommended that a separate
ground wire be connected between the turntable base and the
amplifier GND terminal to minimize hum pick-up.
The AUX input may also be used for any other signal source
having a high level (.15V) output, such as the Bogen Model
TP50 FM/AM Tuner.
Connecting Low-Impedance Unbalanced Microphone Inputs
-R-
-A----- ®
\J ^è—3_
MIC z MIC
AMPLIFIER I
GND COM 0il
AMPLIFIER 2
GNO COM 8A
Figure 2 — Connecting Amplifiers in Series
OUTPUT CONNECTIONS
SPEAKERS: The amplifier may be used with speaker systems
rated at 4, 8 and 16 ohms and with 25-volt and 70-volt constant
voltage systems. For detailed information on the installation of
multiple speaker systems, refer to the Speaker Installation
Instructions (No 54-5001).
Connect the speaker system directly to the speaker output
terminals on the rear of the amplifier. Connect one speaker lead to
the COM terminal and the other
to the terminal corresponding to
the impedance of the speaker system For balanced output lines,
remove the link between COM and GND output terminals. If the
line is shielded, connect the shield to GND. The 70V output is
available only through the 3-pin connectors.
Caution
To minimize shock hazard. Class 1 wiring as
defined in iocai building codes should be used
for 70-volt outputs. Ml other outputs may use
Class 2 wiring.
Connecting High-Impedance Microphone Inputs
HI-* MIC
BOGEN PL-I /
SWITCHCRAFT WO. 445
A7+-4.1SS -01
_______ □)
„
Figure 1 — Comiecting Microphone Cables
CONNECTING AMPLIFIERS IN SERIES
Pairs of Bogen ClOB or C20B amplifiers can be connected in
series to effectively double the power output into the same speaker
system. See figure 2 for eonnection diagram. Be certain to remove
the link between COM and GND of amplifier No. 2, Note that this
arrangement is for unbalanced speaker lines. For balanced lines
also remove the link between COM and GND of amplifier No. 1.
The input cabling must be arranged to parallel the inputs of the
two amplifiers, and the volume and tone controls of both
amplifiers must be at the same setting to assure that each amplifier
will share the load equally.