By: Lectrosonics
Wireless Microphones & Audio Processors
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Digital Matrix Processor

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.

DM84 features include:

  • 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
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

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Prices and specifications subject to change without notice.