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)
- 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)
