Eight-Channel Automatic Mixer with Logic Control

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Eight-Channel Automatic Mixer with Logic Control and EQ per Channel, AC only, One Rack Space, Rack Mount Ready
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Shure Incorporated
Mac & Win
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This eight-channel automatic mixer features the Shure patented IntelliMix®, which activates only microphones being addressed, minimizing poor audio caused by multiple open microphones.


The SCM810 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.

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 46V phantom power per channel

Level selectable peak output limiter

Full rack width (single rack height)

Frequency Response

Voltage Gain


(typical, controls full clockwise)

LineHeadphoneDirect Output
(typical, controls full clockwise)
Low Impedance Mic (150 )80 dB88 dB34 dB
Line40 dB48 dB-6 dB
Aux44 dB  k52 dB-
Send/Return20 dB28 dB-



Designed for use withTypicalOutput Clipping Level
Mic19-600 1.6 k-15 dBV
Line2 k10 k+22 dBV
Aux2 k10 k+22 dBV
Send/Return2 k10 k+18 dBV



Designed for use withTypicalOutput Clipping Level
Line>600 60 +18 dBV
Headphone8-200 , 60  recommended300 +12 dBV
Direct Output>2 k1 k+18 dBV
Send/Return>2 k1 k+18 dBV

Total Harmonic Distortion

<0.1%at +18 dBVoutput 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  source; through 400 Hz-20 kHz filter)
Equivalent Input Hum and Noise-123 dBV(150  source; through 20 Hz-20 kHz filter)
Output Hum and Noisethrough 20 Hz-20 kHz filter; channel controls full counterclockwise
Master full counterclockwise-90 dBV
Master full clockwise-70 dBV

Common Mode Rejection Ratio

>70 dB at 1 kHz


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

Input Channel Activation

Attack Time4 ms
Hold Time0.4 ms (Switchable to 1.0 s)
Decay Time0.5 s


15 dB (switchable to)

Overload and Shorting Protection

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


Low-frequencydB/octavecut, adjustable corner from 25 to 320 Hz
High-Frequency6 dBat 5 kHz8 dBat 10 kHz, shelvingat 5


ThresholdSwitchable: off, +4, +8, +16 ( dBm at output)
Attack2 ms
Recovery300 ms
IndicatorLights red when limiting occurs

Input LEDs

Green on channel activation, red at 6 dBbelow clipping

Phantom Power

46 V DC open-circuit through 6.8 k  series resistance per DIN 45 596

Operating Voltage

SCM810120 V AC rated nominal, 50/60  Hz, 200  mA
SCM810E230 V AC rated nominal, 50/60  Hz, 100  mA

Temperature Range

Operating Temperature0 to 60 C (32 to140 F)
Storage Temperature-30 to 70 C (-20 to165 F)


44.5 mm H x 483 mm W 317 mm D (1 x 19 x 12 in.)

Net Weight

4.3 kg (9  lb ., 9  oz.)

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