8-Channel Microphone Mixer

The Shure Mixer & DSP Series SCM 810 eight-channel automatic mixer features the Shure patented IntelliMix, which activates only microphones being addressed, minimizing poor audio caused by multiple open microphones.

The SCM-810 is designed specifically for installed sound applications.

Features include adjustable EQ per channel, 48 V phantom power, active balanced microphone - or line-level inputs, line-level outputs, highly RF resistant chassis and circuitry, complete logic control of microphone activation, linking capacity for up to 400 microphones, with an internal power supply. 120/230 Vac power.

→ Output Hum and Noise (through 20 Hz to 20 kHz filter; channel controls full counterclockwise))
→ Eight balanced mic-line input channels (Phoenix block connectors)
→ One unbalanced 1/4" aux level input
→ Eight unbalanced 1/4" direct line level outputs
→ One balanced master line level output (Phoenix block connector)
→ Selectable 48V phantom power per channel
→ Level selectable peak output limiter
→ Full rack width (single rack height)

Measurement Conditions (unless otherwise specified)	Line voltage 120 Vac, 60 Hz (SCM810) or 230 Vac, 50 Hz (SCM810E); full gain; 1 kHz, one channel activated; source impedances= Mic 150 ohms, Line 150 ohms terminations= Line 10 kilohms, Phones 300 ohms (tip-sleeve and ring-sleeve), Direct Out 10 kilohms; Auto mode, equalization controls adjusted for flat response
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)	Input= Low-impendance (150 O), Line, Aux, Send/Return; Output Line= 80dB, 40dB, 44dB, 20dB; Output headphones= 88dB, 48dB, 52dB, 28db; Output Direct Out= 34dB, -6dB, - -
Inputs (Mic, Line, Aux, Send/Return)	Impendance Designed for use with: 19-600 O, 32kO, 32kO, 32kO; Impendance Actual (typical)= 10kO, 10kO, 10kO, 10kO; Input Clipping Level= -15dBV, 22dbV, 22dBV, 18dBV
Outputs (Line, Headphones, Direct Out, Send/Return)	Impendance Designed for use with= >600 O, 8-200 O (60 O Recomended), >2kO, >2kO; Impendance Actual (typical)= 60 O, 300 O, 1kO, 1kO; Output Clipping Level= 18dBV, 18dBV, 12dBV, 18dBV, 18dBV
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)
Equivalent Input Noise	-125 dBV (150 ohm source; through 400 Hz - 20 kHz filter)
Equivalent Input Hum and Noise	-123 dBV (150 ohm source; through 20 Hz - 20 kHz filter)
Hum and Noise Master full	counterclockwise= -90 dBV; clockwise= -70 dBV
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
Input Channel Activation	Attack Time= 4 ms; Hold Time= 0.4 s (switchable to 1.0 s); Decay Time= 0.5 s
Off-Attenuation	15 dB (switchable to infinity)
Overload and Shorting Protection	Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V
Low-frequency Equalization	6 dB/octave cut, adjustable corner from 25 to 320 Hz
High-frequency Equalization	/- 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	Green on channel activation, red at 6 dB below clipping
Phantom Power	46 Vdc open-circuit through 6.8 k series resistance per DIN 45 596
SCM810 Operating Voltage	120 Vac rated nominal (see Voltage Selection for 230 Vac operation in User Guide), 50/60 Hz, 200 mA
SCM810E Operating Voltage	230 Vac rated nominal (see Voltage Selection in User Guide for 120 Vac operation), 50/60 Hz, 100 mA
Operating Temperature Range	0 degrees to 60 degrees C (32 degrees to 140 degrees F)
Storage Temperature Range	-30 degrees to 70 degrees C (-20 degrees to 165 degrees F)
Overall Dimensions	44.5 mm H x 483 mm W x 317 mm D (13/4 x 19 x 121/2 inches)
Net Weight	4.3 kg (9 lb 9 oz)