Lectrosonics DM84 Digital Matrix Processor

Lectrosonics DM84 - 8 Input / 4 Output Digital Matrix Processor

Lectrosonics DM84 - 8 Input / 4 Output Digital Matrix Processor

B&H # LEDM84 MFR # DM84
Lectrosonics DM84 Digital Matrix Processor

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  • 1Description

The DM84 from Lectrosonics is an eight-input, four output matrix mixer, with extensive DSP both on input and output, and includes automatic feedback suppression, an automatic mixing algorithm and remote control capabilities. The unit is suitable for sound reinforcement applications, recording in boardrooms, courtrooms, worship centers, distance learning systems and hotels, and can function stand-alone, or as part of a larger LecNet2 system.

DSP includes multiple filters, ADFE (automatic digital feedback eliminators), compressors, limiters and delay on every channel to facilitate signal processing for every possible situation. Processing at the inputs is able to compensate for microphone placement and signal variations, while each output has individual filters and a proprietary, adaptive time constant compressor/limiter to safely feed recorders or power amplifiers.

The mixer matrix allows inputs to behave differently at each output. For example, a microphone input can be part of NOM (Number of Open Microphones) attenuation process, while operating as a direct signal for recording at a different output. Software is included with the DM84 and is used primarily for setup, with the configuration saved on file and into the unit's memory for actual operation. Once configured, the DM84 runs without a host computer.

Extensive control capability is available with an intuitive command structure to allow control with USB or RS-232 connections or touch-panel control systems. Remote control, monitoring and setup can also be done via Ethernet connections. Up to 128 macros can be stored in internal memory.

Eight-in/four-out digital matrix processor in a stackable configuration
Programmable front panel level controls with activity LEDs
Six filters, six feedback eliminators (ADFE), compressor and delay on each input
Nine filters, delay and compressor/limiter on each output
USB and RS-232 interfaces for setup and comprehensive remote control
Balanced, floating differential inputs and outputs
Digital I/O ports for "daisy chaining" and to connect other LecNet 2 devices
Proportional gain auto mixing algorithm with AutoSkew
128 global macros, each with up to 64 commands, and 115 characters per command
In the Box
Lectrosonics DM84 - 8 Input / 4 Output Digital Matrix Processor
  • AC Power Cable
  • 2 x 12" CAT-5e Cables with RJ45 Connectors
  • 2 x DB9 to TRS (Stereo Mini) Cable
  • USB Cable
  • 6 x 5-Pin De-Pluggable Connectors
  • Lectrosonics Screwdriver
  • Software CD-ROM
  • One (1) Year Warranty
  • Table of Contents
    • 1Description
    Frequency Response 20Hz to 20kHz
    Dynamic Range Input: 96dB @ -50dBu input level; 102dB at all other levels (unweighted 20Hz to 20kHz)
    Output: 105dB (unweighted 20Hz to 20kHz)
    Inputs 5-pin Phoenix
    Outputs 5-pin Phoenix
    Other Connectors 4 x RJ-45 Expansion
    1 x DB-25 Logic I/O
    1 x USB
    1 x 1/8" TRS Stereo Mini Serial
    Input Impedance 2.5kΩ
    Output Impedance 450Ω differential programmable outputs at line level
    5Ω differential programmable outputs at microphone level
    Maximum Input Level 20dBu
    Maximum Output Level +20dBu
    Sample Rate 48KHz
    Phantom Power +15VDC, programmable
    Crosstalk Line Level -103 dB
    Mic Level -101 dB
    THD + N 0.02%, nominal input level
    Dimensions (WxDxH) 19" 1U Rackmount
    Weight 3.6 lbs (1.6kg)
    Specialties Up to three units can be stacked to create a 24x 24 mixing matrix
    Packaging Info
    Package Weight 9.25 lb
    Box Dimensions (LxWxH) 24.4 x 14.4 x 6.7"

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