
Shure SCM410 4-Channel Automatic Mixer
Shure SCM410 4-Channel Automatic Mixer 4-channel automatic mixer dramatically improves audio quality in any application in which multiple microphones are required. Features include fast microphone selection, adjustable EQ, and clipping LEDs, 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 Fits in half a rack space Adjustable EQ for each channel Active balanced microphone-level XLR inputs and an active balanced Mic/Line level XLR output Unbalanced auxiliary-level phono output Bi-color channel activation and clipping LEDs Peak-responding output limiter with LED indicator Peak-responding output level meter Specifications: Frequency Response (at 1 kHz, channel controls centered): 50 Hz to 20 kHz +2 dB; –3 dB corner at 25 Hz Total Harmonic Distortion (through 22 Hz – 22 kHz filter; Input at 12 o' clock and Master at 12 o' clock, all other controls full counterclockwise): < 0.1% at +4 dBu output level, 50 Hz to 20 kHz Hum and Noise (150 ã_ source; through 22 Hz – 22 kHz filter): Equivalent Input Hum and Noise: –123 dBV max., –125 dBV typical Output Hum and Noise (channel controls full counterclockwise): Master full counterclockwise: –90 dBV Master full clockwise: –70 dBV Common Mode Rejection: >70 dB at 1 kHz Polarity: All inputs to all outputs are non-inverting Input Channel Activation: Attack Time: 4 ms Hold Time: 0.4 s Decay Time: 0.5 s Off-Attenuation: 13 dB Overload and Shorting Protection: Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to +10 dBV (3V) 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: +16 dBu (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: 12 Vdc open-circuit through 680 ã_ resistors Operating Voltage: SCM410: 100-120 Vac rated nominal, 50/60 Hz, 100 mA (maximum) SCM410E; 220-240 Vac rated nominal, 50/60 Hz, 50 mA (maximum) Mains Inrush Current (230 Vac, SCM410E only): 0.7 A peak Temperature Range: Operating: –7° to 49° C (20° to 120° F ) Storage: –29° to 74° C (–20° to 165° F) Overall Dimensions: 44 mm H x 219 mm W x 267 mm D (13/4 x 85/8 x 101/2 in.) Net Weight: 1.75 kg (3.86 lbs)