Lectrosonics DM84 Digital Matrix Processor

The Lectrosonics DM84 Digital Matrix Processor can route any combination of inputs to any combination of outputs with extremely low throughput latency. Automatic microphone mixing is accomplished via a patented Adaptive Proportional Gain algorithm. Sophisticated filtering is offered on each input and output. A compressor is available on each input, a compressor and limiter on each output. In addition, each input and output can be configured with a delay setting of up to 100 ms for inputs, 250 ms for outputs. The DM84 runs on the latest-generation DSP architecture and can be integrated as part of a larger system by connecting other DM units (like the DMTH4) via the Digital Audio Network Interface (DANI) bus.

Lectrosonics DM84 Features

• 8-in/4-out digital matrix architecture
• Stackable with enlarged matrix up to 24-in/12-out
• Front panel level controls with activity LEDs
• 6 filters plus compressor on each input
• 9 filters plus compressor/limiter on each output
• USB and RS-232 interfaces for setup and control
• Fully balanced audio signal flow through entire system
• Digital I/O ports for connection to other LecNet 2 devices
• Proportional gain auto mixing algorithm with AutoSkew™ - US Patent 5,414,776
• Simultaneous LecNet2 and Third-Party control

• DM84 Digital Matrix Processor1
• Power Cord (Part #21499)1
• Interconnect Cable - Black (Part #21529-1)1
• Interconnect Cable - Red (Part #21710-1)1
• 25-Pin Female Connectors (Part #21558)1
• 5-Position Plug (Part #21580)6
• USB Cable (Part #21713)1
• CAT5 Cable (Part #21716)1
• Adjustment Tool (Part #35679)1
• LecNet2 Software CD 1
• Manual1

• Audio inputs
  • Gain: -10 dB to +60 dB; programmable 1 dB steps
  • Input impedance: 2.5 k Ohm
  • Phantom voltage: 15V, programmable
  • Connector: 5-pin Phoenix
• Audio outputs
  • Floating balanced, either side can be grounded
  • Nominal level: 0 dBu all outputs, -40 dBu selectable on outputs 9 through 12
  • Output impedance
    • 450 Ohm differential programmable outputs at line level
    • 5 Ohm differential programmable outputs at microphone level
• Input Dynamic Range96 dB at -50 dBu input level; 102 dB at all other levels (unweighted 20 - 20 kHz)
• Output Dynamic Range105 dB (unweighted 20 - 20 kHz)
• Audio Performance
  • IMD + noise
    • 0.1% max.
    • 0.02% nominal input level
    • THD + noise
      • 0.1% (worst case)
      • 0.02% nominal input level
      • EIN: -126 dBu
• Connectors
  • Audio I/O: 5-pin Phoenix
  • Expansion: RJ45
  • Logic I/O: DB25
  • Serial: Standard USB and mini TRS
• Digital Audio Network Interface ( DANI)
  • Physical level: LVDS (Low Voltage DIfferential Signal) high speed
  • Connector: Four RJ-45
  • Cable quality: Shielded CAT-5
  • Transmission speed: 50 Mbits/s
• Programmable control inputs
  • Number of inputs: 11
  • Analog voltage range: 0-5V
  • Logic input: TTL, LVTTL, CMOS, LVCMOS
• Programmable control outputs
  • Number of logic outputs: 8
  • Logic control: Active low
  • Max sink current: 100 mA
  • Max supply voltage: 40 V
  • Supply voltage for control I/O: 5 V
  • Max current: 750 mA
• Power requirements100-240 VAC, 47-63 Hz
• Power consumption15 Watts