Shure SCM810 Specification Sheet

SCM810 EIGHT-CHANNEL AUTOMATIC MICROPHONE MIXER
The Shure Model SCM810 is an automatic microphone mixer using Shure's patented IntelliMix operational concept. Intellimix activates only those
microphones being addressed, minimizing the poor audio caused by multiple open microphones. The SCM810 is an eight-channel mixer capa ble of
being linked for installations as large as 400 input channels. The single-rack-height chassis is ideal for installations with limited rack space. The re-
movable header-type input and output connectors are quick, convenient, and eliminate the time and expense of wiring XLR microphone connectors.
SYSTEM FEATURES
• Reliable, quick-acting, noise-free microphone selection
which automatically adjusts to changes in background
room noise
• User-configurable parameters for automatic operation
• Automatic gain adjustment as additional microphones are
activated (NOMA: Number of Open Microphones Attenuator)
• Last Mic Lock-On circuit maintains ambient sound
• Adjustable EQ per channel: low-frequency rolloff and high-
frequency shelving
• 48 V phantom power selectable for each input
SPECIFICATIONS
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 , Line 150 ;
terminations: Line 10 k, Phones 300  tip-sleeve and ring-sleeve),
Direct Out 10 k; 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)
Output
Input Line
Low-impedance mic 80 dB
(150 )
Line 40 dB
Aux 44 dB
Send/Return 20 dB
Inputs
Impedance
Designed for
use with
Input
19-600 
Mic
Line 32 k
Aux 32 k
Send/Return 32 k
TL1031 (Rev. 1)
©2009 Shure Incorporated
Headphones Direct Out
88 dB 34 dB
48 dB -6 dB
52 dB –
28 dB –
Actual Input
(typical) Clipping Level
10 k -15 dBV
10 k +22 dBV
10 k +22 dBV
10 k +18 dBV
SCM810 Automatic Microphone Mixer
• Active balanced microphone- and line-level inputs and line-
level output
• Highly RF-resistant chassis and circuitry
• Bi-color LED indication of channel activation and clipping
• Linking capability for systems up to 400 microphones
• Non-automatic aux-level inputs with level control
• Front-panel headphones output with level control
• Peak-responding output limiter with selectable thresh olds
and LED indicator
Outputs
Impedance
Designed for
use with
Output
>600 
Line
8-200 ,
Headphones
60 
recommended
Direct Out >2 k
Send/Return >2 k
Total Harmonic Distortion (through 20 Hz–20 kHz filter; Input 1 and
Master at 5, all other controls full counterclockwise)
< 0.1% at +18 dBV output level, 50 Hz to 20 kHz
(150  source; through 400 Hz–20 kHz filter)
Hum and Noise
Equivalent Input Noise: –125 dBV
Equivalent Input Hum and Noise (150  source; through
20 Hz–20 kHz filter)
–123 dBV
Output Hum and Noise (through 20 Hz–20 kHz filter; channel con-
trols full counterclockwise)
Master full counterclockwise: –90 dBV
Master full clockwise: –70 dBV
Common Mode Rejection
>70 dB at 1 kHz
Specification Sheet
Actual Output Clipping
Level
(typical)
60 
+18 dBV
300 
+12 dBV
1 k +18 dBV
1 k +18 dBV