Shure SCM800 8-Channel Microphone Mixer

Each SCM800 accepts up to eight microphone- or line–level inputs and one aux-level input (two input jacks feed the same channel). Up to four SCM800 mixers can be linked to provide up to 32 input channels. Each input channel has a two-band equalizer, switchable microphone- or line-level operation, switchable 48 V phantom power, and a ¼-inch send/receive insert jack.

The SCM800 is supplied with rack-mounting hardware, link cable and removable block terminal connectors. An accessory rack panel adapter (Model RKC800, available separately) converts the removable block input and output connectors to XLR connectors, and the Aux connectors to phono jacks.

Features:

• Compatible with Shure SCM410 and SCM810 automatic microphone mixers
• Adjustable EQ per channel: low-frequency rolloff and high-frequency shelving
• 48 V phantom power selectable for each input
• Active balanced microphone- and line-level inputs and line level output
• Highly RF-resistant chassis and circuitry
• LED indication of channel clipping
• Linking capability for systems up to 32 microphones
• Two Aux-level input jacks that feed one channel
• Insert jack on each channel
• Manual mixing of input channels
• Internal Modification permits 120 V operation
• Front-panel headphones output with level control
• Peak-responding output limiter with selectable thresholds and LED indicator

Specifications:

• Voltage Gain: (typical, controls full clockwise)
• 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)
• Hum and Noise:
  • Equivalent Input Noise: -125 dBV (150 Ω source; through 400 Hz-20 kHz filter)
  • Equivalent Input Hum and Noise: -123 dBV (150 Ω source; through 20 Hz-20 kHz filter)
  • Output Hum and Noise: through 20 Hz-20 kHz filter; channel controls full counterclockwise
  • Master full counterclockwise: -90 dBV
  • Master full clockwise: -62 dBV
• Common Mode Rejection Ratio: >70 dB at 1 kHz
• Polarity: Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting
• Overload and Shorting Protection: Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Lines and Monitor inputs by signals up to 20 V
• Equalization:
  • Low-frequency: 6 dB/octave cut, adjustable corner from 25 to 320 Hz
  • High-Frequency: ±6dB/octave at 5 kHz, ± dB at 10 kHz, shelving at 5
• Limiter:
  • Type: Peak
  • Threshold: Switchable: off, +4, +8, +16 ( dBm at output)
  • Attack: 2 ms
  • Recovery: 300 ms
  • Indicator: Lights red when limiting occurs
• Input LEDs: Light at 6 dB below clipping
• Phantom Power: 46 V DC open-circuit through6.8 k Ω series resistance per DIN 45 596
• Operating Voltage: 120 V AC rated nominal, 50/60 Hz, 200 mA
• Temperature Range:
  • Operating Temperature 0° to 60° C (32° to140° F)
  • Storage Temperature -30° to 70° C (-22° to158° F)
• Dimensions: 44.5 mm H x 483 mm W 317 mm D (1¾ x 19 x 12½ in.)
• Net Weight: 4.3 kg (9 lb ., 9 oz.)