Rated Output:
18 dB
Plus or Minus 1 dB, 20 - 20,000 Hz
Distortion:
Less than
0.5 percent, 20 - 20,000 Hz
Signal to noise:
Microphone - 60 dB
Aux
- 70 dB
Inputs:
5 independent balanced low- impedance
transformer-isolated
Input Sensitivity:
Microphone
-
0.003 volts
Aux
-
0.125 volts
Magnetic Cartridge -
0.0005 volts
Input Channel
Isolation:
80 dB minimum
Tone Controls:
Plus or Minus 10 dB range at 50 and 15,000 Hz
Power Requirement:
110-125 Vac 60 Hz
2.3
POWER AMPLIFIERS
**************************************************************************
NOTE: The required wattage rating will be inserted
in the blank. For radio system, this wattage may be
computed as follows: Allow 1 watt for each
loudspeaker. Use 1.4 multiplier for reserve power.
Auditorium systems will have an output of not less
than 20 watts or not less than 10 watts per 100
seats, whichever is greater. Special consideration
will be given to acoustics, speaker placement, and
the functions for which the system will be used,
particularly for large auditoriums where music will
be reproduced or amplified.
**************************************************************************
Power amplifiers as a minimum conform to the following specifications:
Rated power output:
[60] [125] [250] [_____] watts RMS
Plus or Minus
3 dB,
20-20,000 Hz
Distortion:
Less than 2 percent at RPO, 600-13,000 Hz
Input Impedance:
50 k ohm unbalanced
Output Impedance:
Balanced 4 and 8 ohms
Output voltage:
25 and 70.7 volts
Power Requirement:
110-125 Vac 60 Hz
SECTION 16770
Page 8
Previous Page
