Shure SCM810 8-Channel Microphone Mixer

→ 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 ohms, Line 150 ohms terminations= Line 10 kilohms, Phones 300 ohms (tip-sleeve and ring-sleeve), Direct Out 10 kilohms; 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): Input= Low-impendance (150 O), Line, Aux, Send/Return; Output Line= 80dB, 40dB, 44dB, 20dB; Output headphones= 88dB, 48dB, 52dB, 28db; Output Direct Out= 34dB, -6dB, - -
→ Inputs (Mic, Line, Aux, Send/Return): Impendance Designed for use with: 19-600 O, 32kO, 32kO, 32kO; Impendance Actual (typical)= 10kO, 10kO, 10kO, 10kO; Input Clipping Level= -15dBV, 22dbV, 22dBV, 18dBV
→ Outputs (Line, Headphones, Direct Out, Send/Return): Impendance Designed for use with= >600 O, 8-200 O (60 O Recomended), >2kO, >2kO; Impendance Actual (typical)= 60 O, 300 O, 1kO, 1kO; Output Clipping Level= 18dBV, 18dBV, 12dBV, 18dBV, 18dBV
→ Total Harmonic Distortion: <0.1% at +18 dBV output level, 50 Hz to 20 kHz (through 20 Hz-20 kHz filter; Input 1 and Master at 5, all other controls full counterclockwise)
→ Equivalent Input Noise: -125 dBV (150 ohm source; through 400 Hz - 20 kHz filter)
→ Equivalent Input Hum and Noise: -123 dBV (150 ohm source; through 20 Hz - 20 kHz filter)
→ Output Hum and Noise (through 20 Hz to 20 kHz filter; channel controls full counterclockwise))
→ Hum and Noise Master full: counterclockwise= -90 dBV; clockwise= -70 dBV
→ Common Mode Rejection: >70 dB at 1 kHz
→ Polarity: Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting
→ Input Channel Activation: Attack Time= 4 ms; Hold Time= 0.4 s (switchable to 1.0 s); Decay Time= 0.5 s
→ Off-Attenuation: 15 dB (switchable to infinity)
→ Overload and Shorting Protection: Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V
→ Low-frequency Equalization: 6 dB/octave cut, adjustable corner from 25 to 320 Hz
→ High-frequency Equalization: +/- 6 dB at 5 kHz, +/- 8 dB at 10 kHz, shelving
→ Limiter: Type= Peak; Threshold= Switchable: off, +4, +8, +16 (dBm 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: 46 Vdc open-circuit through 6.8 k series resistance per DIN 45 596
→ SCM810 Operating Voltage: 120 Vac rated nominal (see Voltage Selection for 230 Vac operation in User Guide), 50/60 Hz, 200 mA
→ SCM810E Operating Voltage: 230 Vac rated nominal (see Voltage Selection in User Guide for 120 Vac operation), 50/60 Hz, 100 mA
→ Operating Temperature Range: 0 degrees to 60 degrees C (32 degrees to 140 degrees F)
→ Storage Temperature Range: -30 degrees to 70 degrees C (-20 degrees to 165 degrees F)
→ Overall Dimensions: 44.5 mm H x 483 mm W x 317 mm D (13/4 x 19 x 121/2 inches)
→ Net Weight: 4.3 kg (9 lb 9 oz)
→ 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 48V phantom power per channel
→ Level selectable peak output limiter
→ Full rack width (single rack height)