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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 k
Ω
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)
Output
Input Line Mic Aux
Low-impedance mic (150 Ω) 80 dB 40 dB 68 dB
Inputs
Impedance
Input
Designed for
use with
Actual
(typical)
Input
Clipping Level
Mic 19-600 Ω 1.4 kΩ -14 dBV
Outputs
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
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 counterclockwise):
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;
eligible 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
European EMC standard EN 55103. It meets the applicable
tests and performance criteria found in the standard for
these environments. EMC conformance is based on the
use of recommended and supplied cables.
NOTE: Under certain circumstances, the SCM410E may be
exposed to outside electromagnetic interference levels be-
yond what is typical in the intended environment. Should
this occur, additional measures may be required to reduce
interference to acceptable levels. The following table identi-
fies possible sources of unwanted interference.
Decreased
Signal-to-
Noise Ratio
Erratic LED
and/or
Channel Operation
Signal
Distortion
High RF Field (gen-
erated by nearby
radio transmitter)
X X X
Electrostatic
Discharge
X X
Magnetic Fields
(close proximity to
mains power lines or
CRTs)
X X
Mains Power Line
Interruptions/Dips
(poor power grid
qualtiy/storms)
X X
Mains Surges and
Line Transients
(nearby lightning
strikes/mains arcs)
X X