9
SPECIFICATIONS
Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM410) or 230 Vac, 50 Hz (SCM410E); full gain;
1 kHz, one channel activated; source impedances: Mic 150
Ω; terminations: Line/Mic Aux 10 kΩ
Frequency Response (at 1 kHz, channel controls centered)
50 Hz to 20 kHz ±2 dB; –3 dB corner at 25 Hz
Voltage Gain (typical, controls full clockwise)
Inputs
Outputs
Total Harmonic Distortion
<0.1% at +4 dBu output level, 50 Hz to 20 kHz (through
22 Hz to 22 kHz filter; Input at 12 o' clock and Master at 12 o'
clock, all other controls full counterclockwise)
Hum and Noise (150 Ω source; through 22 Hz to 22 kHz filter)
Equivalent Input Hum and Noise: –123 dBV max., –125 dBV
typical
Output Hum and Noise (channel controls full counterclock-
wise):
Master full counterclockwise: –90 dBV
Master full clockwise: –70 dBV
Common Mode Rejection
>70 dB at 1 kHz
Polarity
All inputs to all outputs are non-inverting
Input Channel Activation
Attack Time: 4 ms
Hold Time: 0.4 s
Decay Time: 0.5 s
Off-Attenuation
13 dB
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no
damage. Microphone inputs are not damaged by signals up
to +10 dBV (3V)
Equalization
Low-frequency: 6 dB/octave cut, adjustable corner from 25 to
320 Hz
High-frequency: ±6 dB at 5 kHz, ±8 dB at 10 kHz, shelving
Limiter
Type: Peak
Threshold: +16 dBu (at output)
Attack Time: 2 ms
Recovery Time: 300 ms
Indicator: Lights red when limiting occurs
Input LEDs
Green on channel activation, red at 6 dB below clipping
Phantom Power
12 Vdc open-circuit through 680
Ω resistors
Operating Voltage
SCM410: 100-120 Vac rated nominal, 50/60 Hz,
100 mA (maximum)
SCM410E; 220-240 Vac rated niminal, 50/60 Hz,
50 mA (maximum)
Mains Inrush Current (230 Vac, SCM410E only)
0.7 A peak
Temperature Range
Operating: –7
° to 49° C (20° to 120° F )
Storage: –29
° to 74° C (-20° to 165° F)
Overall Dimensions
44 mm H x 219 mm W x 267 mm D (1-
3
/
4
x 8-
5
/
8
x 10-
1
/
2
in.)
Net Weight
1.75 kg (3.86 lbs)
Certifications
SCM410: UL LISTED to UL 6500 and cUL LISTED to E65
Canada.
SCM410E: Conforms to applicable European Directives; el-
igible to bear CE marking. Low Voltage Directive 73/23/EEC:
VDE GS-Certified to EN 60065. EMC Directive 89/336/EEC:
Professional Audio Products Standard EN55103 (1996);
Part 1 (Emissions) and Part 2 (Immunity).
Electromagnetic Compatibility (EMC) Statement
The SCM410E mixer is intended for use in E1 (residential)
and E2 (light industrial) environments, as defined in Europe-
an EMC standard EN 55103. It meets the applicable tests
and performance criteria found in the standard for these en-
vironments. EMC conformance is based on the use of rec-
ommended and supplied cables.
NOTE: Under certain circumstances, the SCM410E may be
exposed to outside electromagnetic interference levels beyond what
is typical in the intended environment. Should this occur, additional
measures may be required to reduce interference to acceptable
levels. The following table identifies possible sources of unwanted
interference.
Output
Input Line Mic Aux
Low-impedance mic (150 Ω) 80 dB 40 dB 68 dB
Impedance
Input Designed for
use with
Actual
(typical)
Input Clipping
Level
Mic 19-600 Ω 1.4 kΩ –14 dBV
Impedance
Output Designed for
use with
Actual
(typical)
Output Clipping
Level
Line ≥5k Ω 300 Ω +24 dBV
Mic ≥600 Ω 3 Ω –18 dBV
Aux ≥10k Ω 1.5 k Ω +14 dBV
Decreased
Signal-to-Nois
e Ratio
Erratic LED
and/or Channel
Operation
Signal
Distortion
High RF Field
(generated by
nearby radio
transmitter)
XXX
Electrostatic
Discharge
XX
Magnetic Fields
(close proximity
to mains power
lines or CRTs)
XX
Mains Power Line
Interruptions/Dips
(poor power grid
qualtiy/storms)
XX
Mains Surges
and Line
Transients
(nearby lightning
strikes/mains
arcs)
XX
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