Shure Comprehensive Guide to the SCM800 Microphone Mixer

SCM800/SCM800E MICROPHONE MIXER SPECIFICATION SHEET

SPECIFICATIONS

Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM800) or 230 Vac, 50 Hz (SCM800E); full gain; 1 kHz.

Source impedances: Mic 150 Ω, Line 150 Ω.

Terminations: Line 10 kΩ, Phones 300 Ω (tip-sleeve and ring-sleeve), Direct Out 10 kΩ.

Equalization controls adjusted for flat response, Channel 1 gain control full clockwise, other gain controls full counterclockwise

Frequency Response (Ref .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	Headphones	Direct Out
Low-impedance mic	80 dB	88 dB	34 dB
(150 Ω)
Line	40 dB	48 dB	–6 dB
Aux	44 dB	52 dB	-
Send/Return	20 dB	28 dB	-

Inputs

Common Mode Rejection

>70 dB at 1 kHz

Polarity

Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting

Overload and Shorting Protection

Shorting outputs, even for prolonged periods, causes no dam- age. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V

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: Switchable: off, +4, +8, +16 (dBm at output)

Attack Time: 2 ms

Recovery Time: 300 ms

Indicator: Lights red when limiting occurs

Input LEDs

Light at 6 dB below clipping

		Impedance
	Designed for		Actual	Input
Input	use with		(typical)	Clipping Level
Mic	19-600 Ω		10 kΩ	–15 dBV
Line	≤	Ω	10 kΩ	+22 dBV
		2 k
Aux	≤	Ω	10 kΩ	+22 dBV
		2 k
Send/Return	≤	Ω	10 kΩ	+18 dBV
		2 k
Outputs
		Impedance
	Designed for		Actual	Output
Output	use with		(typical)	Clipping Level
Line	>600 Ω		60 Ω	+18 dBV
Headphones	8-200 Ω,		300 Ω	+12 dBV
	60 Ω
	recommended
Direct Out	>2 kΩ		1 kΩ	+18 dBV
Send/Return	>2 kΩ		1 kΩ	+18 dBV

Total Harmonic Distortion

<0.1% at +18 dBV output level, 50 Hz to 20 kHz (through 20 Hz-20 kHz filter; Input 1 and Master at 5, all other controls full counterclockwise)

Hum and Noise

Equivalent Input Noise: –125 dBV (150 Ω source; through 400 Hz—20 kHz filter)

Equivalent Input Hum and Noise: (150 Ω source; through 20

Hz—20 kHz filter) –123 dBV

Output Hum and Noise (through 20 Hz—20 kHz filter; channel controls full counterclockwise):

Master full counterclockwise: -90 dBV

Master full clockwise: -62 dBV

Phantom Power

46 Vdc open-circuit through 6.8 kΩ series resistance per DIN 45 596

Operating Voltage

SCM800: 120 Vac rated nominal (see Voltage Selection for 230 Vac operation), 50/60 Hz, 200 mA

SCM800E: 230 Vac rated nominal (see Voltage Selection for 120 Vac operation), 50/60 Hz, 100 mA

Temperature Range

Operating: 0° to 60° C (32° to 140° F )

Storage: -30°to 70° C (-22°to 158° F)

Overall Dimensions

44.5 mm H x 483 mm W x 317 mm D (13/4 x 19 x 121/2 in.)

Net Weight

4.3 kg (9 lb 9 oz)

Certifications

SCM800: UL LISTED (U.S.) and cUL Certified (Canada)

SCM800E: Conforms to European Union directives; eligible to bear CE marking.

REPLACEMENT PARTS

Knob, Channel Gain & Phones (white)	........................ 95A8238
Knob, Master (blue)	95B8238
Line (Power) Cord (SCM800)	95B8389*
Line (Power) Cord (SCM800E)	95C8247*
Link Cable	95B8889
Three -Terminal Block Connector	95B8580

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