Specifications - Shure SR105 Operation And Service Manual

SR105 Power Amplifier
SPECIFICATIONS
The following specifications apply to both SR105A and SR105B Power Amplifiers except where noted. The SR105A Power
Amplifier provides both direct-coupled speaker output and transformer-coupled, constant-voltage, 70-volt output. The
SRlO5B Power Amplifier is equipped for direct-coupled speaker output only.
. . . . . . .
Amplifier Type All silicon transistor power
amplifier
Power Output
. . . . . . .
.200 watts rms continuous to
4-ohm load
100 watts rms continuous to
8-ohm load
150 watts rms continuous to
70-volt line (33-ohm load)*
Voltage Gain
. . . . . . . . .
27 2 2 dB (4-ohm load at 1 kHz)
35 e3.5 dB (33-ohm load at 1 kHz
across 70-volt output)'
Sensitivity
. . . . . . . . . . .
1.2 volts nominal (full rated output)
Frequency Response
.
.
&I
.5 dB, 20-20,000 Hz (typical)
*2 dB, 50-15,000 Hz (typical,
70-volt output)"
Input Impedance
. . . .
.39 kilohms &30%, balanced or
unbalanced*
25 kilohms &30%, balanced or
unbalanced*
*
Total Harmonic
Distortion
. . . . . . . .
. 2 % max. at 1 kHz, 200W (4-ohm
load, 28.3 Vrms output)
3% max. at 1 kHz, 150W (33-ohm
load, 70.7 Vrms output)*
Hum and Noise
. . . . . .
.80 dB below rated output (less than
2.8 mV at direct-coupled speaker
output with Volume Control at 0)
Output Clipping Level.
.
28.3 Vrms min. at 1 kHz (4-ohm
load)
Load lmpedance:
Direct-Coupled
Speaker Output
.
. 4 ohms or greater (4 ohms min.)
70-Volt Output*
. . .
. I 5 0 watts max. (33 ohms min.)
Load Regulation:
Di rect-Coupled
Speaker Output . . Less than 1 dB from no-load to 4-
ohm load at 200 watts rms out-
put
. . . .
70-Volt Output* Less than 2 dB from no-load to 33-
ohm load at 150 watts rms out-
put
Phasing..
. . . . . . . . . . .
Pin 3 and phone jack tips of in-
puts in phase with speaker out-
put phone jack tips, and 28V
and 70V terminals
Power Supply
. . . . . . . .
120 volts, 50/60 Hz ac only. Power
consumption: 40 watts max. (20
watts typical) with no signal, 450
watts with 1 kHz signal and 200
watts output; 500 watts maximum
Temperature Range:
Operating
. . . . . . . . .
-7' to 43OC (20' to 1 10°F)
Storage
. . . . . . . . . . .
-34' to 74OC (-30' to 165OF)
Dimensions
. . . . . . . . .
.I78 mm x 483 mm x 270 mm
(7 in. H x 19 in. W x 10% in. D)
Weight:
SR105A
. . . . . . . . . . .
15.66 kg (34 Ib 8 oz)
SR105B
. . . . . . . . . . .
12.23 kg (27 Ib)
Finish
. . . . . . . . . . . . . .
Matte black
Installation
. . . . . . . . . .
Equipped for standard 19" (483
mm) rack mounting; may be op-
erated in optional A105A Carry-
ing Case
Certifications
........
Listed by Underwriters' Labora-
tories, Inc.; listed by Canadian
Standards Association as certi-
fied
Model SR105A
onl y .
"Model SR105B
onl y .