Shure SCM810 8-Channel Automatic Mixer

8-channel automatic mixer improves audio quality in any application in which multiple microphones are required. Features include fast microphone selection, adjustable EQ, adjustable low-frequency roll off, and peak-responding output limiter.

Features:

• Fast, noise-free microphone selection, which automatically adjusts to changes in background noise
• Automatic gain adjustment as additional microphones are activated - NOMA (Number of Open Microphones Attenuated)
• Last Mic Lock-On circuit maintains ambient sound
• Adjustable low-frequency roll off and high-frequency shelving for each channel
• Channel activation and clipping indicators
• Active balanced microphone-level XLR inputs and an active balanced Mic/Line level XLR output
• Aux-level input with manual level control
• Front-panel headphones output with level control
• Peak-responding output limiter with selectable thresholds and LED indicator
• Linking capability for up to 400 microphones

Specifications:

• Monitor/Headphone Out: 1 - 1/4" TRS Phone jack (Headphone)
• ALT I/O:
  • 1 - AUX line input 1/4" Phone (front panel)
  • 1 - Microphone Logic connection DB25 male connector
• Link Input/Output: 2 - Link In / Link Out 1/4" Phone jacks
• Impedance:
  • Input:
    • MIC: Designed for use with 19-600 ohm load, 1.6k ohms actual, -15dBv clipping level
    • LINE: Designed for use with < 2k ohm load, 10k ohms actual, +22dBV clipping level
    • AUX: Designed for use with < 2k ohm load, 10k ohms actual, +22dBV clipping level
    • SEND/RETURN: Designed for use with < 2k ohm load, 10k ohms, +18dBV
  • Output:
    • LINE: Designed for use with >600 ohm load, 60 ohms actual, +18dBV clipping level
    • HEADPHONES: Designed for use with 8-200 ohms, 60 ohm recommended, 300 ohms actual, +12dBV clipping level
    • DIRECT OUT: Designed for use with > 2k ohm load, 1k ohms actual, +18dBV clipping level
    • SEND/RETURN: Designed for use with > 2k ohm load, 1k ohms actual, +18dBV clipping level
• Gain:
  • Low-impedance mic (150 ohms) Input: Line 80dB, Headphones 88dB, Direct Out 34dB - Outputs
  • Line Input: Line 40dB, Headphones 48dB, Direct Out -6dB - Outputs
  • Aux Input: Line 44dB, Headphones 52dB - Outputs
  • Send/Return Input: Line 20dB, Headphones 28dB - Outputs
• Phantom Power: 46 Vdc open-circuit through 6.8k ohms series resistance per DIN 45 596
• Operating Temperature:
  • Operating: 0 to 60 degrees C (32 to 140 degrees F)
  • Storage: -30 to 70 degrees C (-20 to 165 degrees F)
• Power: 120 Vac rated nominal, 50/60Hz, 200mA
• Dimensions: 1.75 x 19.13 x 12.4 (44.5 x 483 x 317mm) (H x W x D)
• Weight: 9.57 lbs (4.3kg)