10
SPECIFICATIONS
Measurement Conditions (unless otherwise specified):Tone controls
centered; Line voltage 120 Vac, 60 Hz (SCM262) or 230 Vac, 50 Hz
(SCM262E);
full gain; 1 kHz, one channel activated;
source impedances:
Mic 150
Ω
; Line/Aux 40
Ω
, terminations: Line/Mic/Aux 20 k
Ω.
Frequency Response (Ref 1 kHz, channel and master
controls centered)
MIC/LINE Inputs: 150 Hz to 20 kHz ±2 dB
AUX Inputs: 20 Hz to 20 kHz ±2 dB
Low-Cut Filter (Microphone inputs only)
3dB down at 80 Hz, 6 dB/octave
Voltage Gain (typical, controls full clockwise)
Inputs
Outputs
Total Harmonic Distortion
<0.25% at +4 dBu output level, (through 22 Hz—22 kHz filter;
MIC Input 1 and Master at center, all other controls full coun-
terclockwise)
Equivalent Input Hum and Noise (150 W source; 22 Hz—
22 kHz)
–125 dBV
Output Hum and Noise (22 Hz—22 kHz; channel controls full
counterclockwise)
Master full counterclockwise ................................–85 dBV
Master full clockwise ............................................–60 dBV
Common Mode Rejection
>70 dB at 1 kHz
Polarity
All inputs to all outputs are non-inverting.
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no
damage. Microphone inputs are not damaged by signals up
to +10 dBV; Line and Aux inputs by signals up to +28 dBV
Equalization
Bass (Low-frequency shelving,
corner frequency at 250 Hz)
......................................±6 dB
Treble (High-frequency shelving,
corner frequency at 4 kHz)
.........................................±6 dB
Ducking
Mic channels 1 and 2 Levels.................. –20 dB or –
∞ dB
Activation time ........................................... 10 ms (typical)
Mic Deactivation time...................................... 2 s (typical)
Jukebox Mute Deactivation Time..................30 s (typical)
Phantom Power
12 Vdc open-circuit through 680 Ω resistors
Operating Voltage
SCM262: 100—120 Vac, 50/60 Hz, 60 mA
SCM262E: 220—240 Vac, 50/60 Hz, 30 mA
Temperature Range
Operating ............................–7° to 49° C (20° to 120° F )
Storage ..............................–29° to 74° C (–20° to 165° F)
Overall Dimensions
43 x 218 x 162 mm (1.72 x 8.60 x 6.37 in.)
Net Weight:1.1 kg (2 lbs, 5 oz)
Certifications
SCM262: UL, cUL listed by Underwriters Laboratories.
SCM262E: Conforms to European Union directives, eligible
to bear CE marking; VDE GS-Certified to EN 60 065; meets
European Union EMC Immunity Requirements (EN 50082-1:
1992, EN 50082-2: 1992)
Replacement Parts
Knob, Master (blue) ..........................................95B8752
Knob, Channel Gain (white).............................. 95A8752
Line (Power) Cords:
SCM262: 100—120 Vac (US/Canada) ........95A8762
SCM262E: 220—240 Vac (EU).................... 95A8778
Fuse:
SCM262 (5x20 mm, 250V,
100mA, time delay) ....................................... 80B730
SCM262E (5x20 mm, 250V,
40mA, time delay)...........................................80J258
Hardware Kit ...................................................90AF8100
Link Bars (Bracket) ...........................................53A8443
Single Mount Bracket........................................53A8484
Dual Mount Bracket .........................................53B8484
Optional Accessories
Line (Power) Cord, 230—240 Vac (UK)............ 95A8713
Service Statement
For additional service or parts information, please contact
Shure's Service department at 1-847-600-8699. Outside the
United States, please contact your authorized Shure Service
Center.
Output
Input Mic Line Aux
Low-impedance mic
(150 Ω)
32 dB 72 dB 60 dB
Line –9 dB 31 dB 19 dB
Stereo –5 dB 35 dB 23 dB
Impedance
Input
Designed
for use with
Actual
(typical)
Input
Clipping Level
Mic (XLR) <600 Ω 1.4 kΩ –16 dBV
Line <10 kΩ 155 kΩ +24 dBV
Stereo <2 kΩ 21 kΩ >28 dBV
Impedance
Output
Designed for
use with
Actual
(typical)
Output
Clipping Level
Mic > 600 Ω 3 Ω –22 dBV
Line >5k Ω 300 Ω +18 dBV
Aux ≥10 kΩ 1.5k Ω +5 dBV
