2
DESIGN
The Wall Mount Amplifier is designed to provide 15
watts of audio power to operate 4-8 ohm, 25 volt or 70
volt type speakers and horns. The priority mode is
switch selectable. When the amplifier is in the priority
mode
MIC 1/TEL overrides AUX 1
.
An ON/OFF switch is not required for operation of the
Wall Mount Amplifier. The unit is activated when the
AC power cord is plugged in. The power LED
illuminating indicates the amp is ON.
The amplifier has a master volume control plus
separate bass and treble controls. The unit also
contains a replaceable fuse.
INSTALLATION
General
The Clarity 15 Watt Wall Mount Amplifier provides
connections for two input sources:
One Tel Line/Mic input and One Auxiliary input.
Precautionary Designations
CAUTION: To reduce the risk of electric shock,
Do not remove cover.
No user serviceable parts inside.
Refer servicing to qualified service personnel.
This symbol indicates that dangerous
voltage constituting a risk of electric
shock is present within this unit.
This symbol indicates that there are
important operating and maintenance
instructions in the literature accompanying
this unit.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Mounting
The Clarity 15 Watt Wall Mount Amplifier was
designed for wall mounting. When mounting this unit,
secure it to wall studs or a suitable brace. (A plywood
backboard 2' square and at least 1/2" thick attached to
wall studs would be considered a suitable brace).
Make certain the unit is not mounted near heat sources
or strong magnetic fields. Ascertain control and
terminal strip accessibility.
Four #10 x 3/4 cross-tip round head wood screws are
included for mounting. Fasten two of these screws at
the appropriate location on the mounting surface
(approximately 10" apart and parallel to the floor),
allowing the screwheads to protrude 1/8" to 1/4". Place
the chassis of the unit onto the screwheads at the
mounting slots. Position the two remaining screws and
fasten through the remaining slots. Complete the
mounting by tightening the screws.
Mic Connections
The Clarity Wall Mount Amplifier provides
connections for low impedance balanced microphones.
For the Mic 1 input, connect the positive pressure lead
of the microphone (normally pin 2 of a standard XLR
connector) to the Mic 1 screw terminal; connect the
microphone shield to the Mic 1 ground screw terminal
and the negative pressure lead of the microphone to the
remaining Mic 1 screw terminal. (Refer to Figure 2).
Page Port Connections
When using the Tel Line input, connect audio page
ports only. Connect Tip to terminal 2 designated as
COM, connect Ring to terminal 3 designated as
Mic/Tel Line; strap terminal 1 to terminal 2.
NOTE: Interface devices are required when
connecting to outside C.O. Lines, PABX extensions,
single line telephones or telephone system trunk ports.
(Refer to Figure 3).
Auxiliary Connections
High impedance auxiliary devices such as a tuner, tone
generator, etc. can be connected to the AUX input.
Connect common out to one AUX screw terminal and
audio out to the remaining AUX screw terminal.
(Refer to Figure 2).
Speaker Cabling
When the 8 ohm output is used, standard two conductor
speaker wire can be used (18-20 AWG determined by
the load). If the 25 or 70V output is used, two
conductor shielded cable is recommended for speaker
connections. NOTE: When shielded cable is used, the
shield should be connected to the ground screw
terminal.
Terminal Setup
Volume and tone controls are screwdriver adjustable.
During initial system setup, it is recommended that the
individual gain controls be set 1/4 turn and the master
volume control be set 1/4 turn.
All connections should be made to the
amplifier and double-checked before the AC
power cord is plugged in.
