The M-864D is a 4U rack mountable Digital stereo mixer having 22 input channels including 8 monaural input channels and 7 stereo input channels, 6 output channels including 4 monaural output channels and 1 stereo recording output channel, and 4 bus channels. It is equipped with digital signal processing functions such as Automatic resonance control function (ARC(*1)), Feedback suppressor function (FBS), Automatic stereo input mute function (AUTO MUTE or Ducker), and Equalizer. Advanced acoustic compensation can be automatically performed without using an acoustic measuring instrument. Furnished with various function setting buttons and 14 analog volume faders, the M-864D can be operated without need for use of a PC. However, it can also be operated by connecting the PC or optional Remote control panel. It can be mounted in an EIA component rack (4U size). (*1) Automatic Resonance Control function automatically creates the filter curve to improve sound clarity by measuring the acoustic characteristics inherent in architectural space.

Power Source 220-240 V AC, 50/60 Hz
Power Consumption 30 W
Frequency Response 20 Hz - 20 kHz, ±1 dB
Sampling Frequency 48 kHz
Dynamic Range 100 dB or more
Distortion 0.03 % or less, 1 kHz, +4 dB(*2) input/output, 20 Hz - 20 kHz BPF
Crosstalk -80 dB or less, 1 kHz

Input

• Monaural input, 8 channels, removable terminal block (3P)
• Phantom power (+24 V DC, 10 mA, ON/OFF switchable for each channel)
• Gain setting (settable for each channel)
• :PAD ON Gain min., +4 dB(*2) (max. +24 dB(*2)), 10 kΩ, electronically-balanced
  Gain max., -14 dB(*2) (max. +6 dB(*2)), 10 kΩ, electronically-balanced
• :PAD OFF Gain min., -10 dB(*2) (max. +10 dB(*2)), 7 kΩ, electronically-balanced
• Gain max., -56 dB(*2) (max. -36 dB(*2)), 7 kΩ, electronically-balanced
• Stereo Input (L, R), 7 channels (1-A, 1-B, 1-C, 2-A, 2-B, 2-C, front-mounted input)
• RCA jack (stereo mini jack provided on the front panel)
  : -10 dB(*2) (max. +10 dB(*2)), 10 kΩ
  " Trim gain for each individual channel: - to 0 dB (except front-mounted input)
  ※ 1-A (L), 1-B (L), and 1-C (L) are mixed after passing through each trim gain circuit
  (the same applies to R channel)
  ※ 2-A (L), 2-B (L), and 2-C (L) are mixed with front-mounted input after passing
  " through each trim gain circuit (the same applies to R channel)

Output

• Output, 4 channels, +4 dB(*2) (max. +24 dB(*2)), applicable load 600 Ω or more,
  electronically-balanced, removable terminal block (3P)
• REC OUT (L, R): -10 dB(*2) (max. +10 dB(*2)), applicable load 1 kΩ or more, RCA jack
• Gain is adjustable.
• AD Converter 24 bits
• DA Converter 24 bits
• Preset Memory 16

Signal Processing Section

• Automatic Resonance Control (ARC) Function Automatic EQ curve creation by ARC, 4 channels (each output channel),
  settable independently on each channel,
  ARC measuring start switch ×1, ON/OFF LED ×1
• Feedback Suppressor Function Feedback suppressor filter creation, 8 channels (each monaural input channel),
  settable independently on each channel,
  ON/OFF switch ×8, ON/OFF LED ×8
• Filter 8 channels (each monaural input channel), settable independently on each channel,
  high-pass filter: 20 Hz - 20 kHz
• Tone Controller BASS, Low-shelving filter: 20 - 500 Hz, ±15 dB
  MID, parametric equalizer: 20 Hz - 20 kHz, ±15 dB
  Q: 0.267 - 69.249
  TREABLE, high-shelving filter: 6 - 20 kHz, ±15 dB
  10 channels (each monaural input channel, each stereo mixing input channel),
  settable independently on each channel
• Equalizer Parametric equalizer: 20 Hz - 20 kHz, ±15 dB, Q: 0.267 - 69.249
  4 channels (each output channel)
• Matrix 12×4
• Crosspoint Gain - to 0 dB in 1 dB steps
• Automatic Mute Function Stereo input section matrix, independent control
• Function Input PAD (-16 dB) control, low cut (cutoff frequency: 100 Hz) control,
  analog output attenuator (-6 dB, -12 dB, -18 dB, -24 dB, -36 dB, -42 dB) control,
  front panel operation lock function, stereo summing function,
  function setting panel (3 rotary encoders)

Front Panel Section

• Input Level Indicator 3-point LED, 12 channels (each monaural input channel, stereo 1L, 1R, 2L, 2R)
• Output Level Indicator 8-point LED, 4 channels (each output channel)
• Auto Resonance Control (ARC) Measurement ARC measuring start switch ×1, ON/OFF LED ×1
• Feedback Suppressor (FBS) Function ON/OFF switch ×8, ON/OFF LED ×8
• Low Cut ON/OFF switch ×8, ON/OFF LED ×8
• Stereo Summing ON/OFF switch ×2, ON/OFF LED ×2
• Tone Control BASS, MID, TREBLE/Settable on the function setting panel, 10 channels
  (each monaural input channel, stereo 1L, 1R, 2L, 2R)
• Monaural Input, Analog Setting Gain setting, PAD ON/OFF, Phantom power ON/OFF
  Settable on the function setting panel, 8 channels (each monaural input channel)
• Stereo Input, Analog Setting Trim setting
  Settable on the function setting panel, 6 channels (1-A, 1-B, 1-C), (2-A, 2-B, 2-C)
• REC OUT, Gain Setting Gain setting
  Settable on the function setting panel, 2 channels (REC OUT L, REC OUT R)
• Preset Memory Switching Preset selection switch ×4, ON/OFF LED ×4
• Front Panel Operation Lock Operation lock switch ×1, ON/OFF LED ×1
• Operation Status Indication Operation status LED ×3
• Function Setting Panel Rotary encoder ×3, 10-point position indication LED ×3, Function mode LED ×3
• Analog Volume Fader Input volume fader ×10, Output volume fader ×4,
  2 faders linkable with supplied gang bar

Control Section

• Contact Input 8 channels, open voltage: 24 V DC, short-circuit current: 5 mA,
  removable terminal block (10P),
• Contact output 8 channels, no-voltage make contact, contact capacity: 24 V DC/100 mA,
  removable terminal block (10P),
• Remote Control Panel 2 channels, Maximum number of units: 8 units per channel
  24 V DC input ×2, termination ON/OFF switch ×1, removable terminal block (10P)
  Maximum total cable length (star wiring): 800 m (total for 2 channels)
  Maximum cable length (daisy chain wiring): 400 m per channel
  Note: In daisy chain wiring, the number of units differs depending on the cable length.
  Star wiring and daisy chain wiring cannot be used together.
  Type of cable: Shielded CPEV cable (a pair of data cable and a pair of power supply
  cable) or shielded Cat 5 twisted pair cable for LAN (CAT5-STP)
• Network Network I/F: 1 channel of 10BASE-T/100BASE-TX (auto-negotiation)
  RJ45 connector, connection via switching hub
  Network protocol: TCP/IP
  Connection cable: Shielded Cat. 5 or higher twisted pair cable for LAN
  (Cat. 5-STP or better)
  Maximum cable length: 100 m (between M-864D and switching hub)
• Operating Temperature 0 ℃ to +40 ℃ (32 ã‚œF to 104 ã‚œF)
• Operating Humidity 90 %RH (no condensation)
• Finish Panel: Aluminum, hairline, black, Case: Surface-treated steel plate
• Dimensions 482.6 (W) × 177.1 (H) × 157.2 (D) mm (19 × 6.97" × 6.19")"
• Weight 5.1 kg (11.24 lb)
• Accessories Power supply cord (2 m (6.56 ft)) ×1, removable terminal plug (3P) ×12,
  large type removable terminal plug (10P) ×2, small type removable terminal plug (10P) ×1,
  fader gang bar ×4, protective cover ×1, rack mounting screw ×4,
  CD-ROM (containing setup software) ×1
• Option Remote control panel: ZM-9011/9012/9013/9014
  AC adapter: AD-246(*3)(When using the Remote Control Panel)