DM84

8x4 Digital Matrix Processor
Routes any combination of 8 inputs to 4 outputs with ultra-low latency for precise audio control.

Advanced DSP on All Channels
Includes filters, compressor, delay on inputs; filters, compressor/limiter, and delay on outputs.

Automatic Microphone Mixing
Uses patented Proportional Gain and AutoSkew™ algorithms for clear, feedback-free performance.

Stackable for Expansion
Combine up to 3 units to build up to a 24x12 matrix for large-scale installations.

Feedback Suppression Built In
Each input features six ADFE (automatic digital feedback eliminators) for reliable sound reinforcement.

Flexible Control Options
Configure and control via USB, RS-232, Ethernet, or digital I/O; compatible with AMX and Crestron systems.

Phantom Power Support
Switchable +15V phantom power for condenser microphones on all mic/line inputs.

Standalone or Networked Use
Functions independently or integrates into LecNet2 systems with daisy-chained digital I/O.

Intuitive Front Panel
Includes programmable gain knobs and activity LEDs for hands-on control and monitoring.

Complete with Setup Tools
Includes all cables, software, and accessories needed for installation and configuration.

General Specifications
Device Type: Digital Matrix Audio Processor
Model: Lectrosonics DM84
Matrix Configuration: 8 Inputs / 4 Outputs
Expandable Configuration: Up to 24 x 12 (with 3 stacked units)
DSP Architecture: Latest-generation DSP with ultra-low latency
Auto Mixing: Adaptive Proportional Gain with AutoSkew™ (US Patent 5,414,776)
Phantom Power: +15 VDC, programmable per input
Front Panel: 4 Programmable Level Controls with Activity LEDs
Control Interfaces: USB, RS-232, Ethernet, 1/8" TRS Serial
Digital I/O: 4 x RJ-45 for LecNet2 daisy-chaining
Macro Support: 128 global macros (64 commands per macro, 115 characters per command)

Audio Performance
Frequency Response: 20 Hz – 20 kHz
Dynamic Range:
– Input: 96 dB @ -50 dBu, 102 dB at other levels (unweighted)
– Output: 105 dB (unweighted)
THD+N: 0.02% (nominal input level)
Crosstalk:
– Line Level: –103 dB
– Mic Level: –101 dB
Sample Rate: 48 kHz

Signal Processing
Input Channels: 6 filters, 6 ADFE (automatic digital feedback eliminators), compressor, delay (up to 100 ms)
Output Channels: 9 filters, compressor/limiter, delay (up to 250 ms)
Mixing Modes: Independent and Phantom NOM Buses
Signal Flow: Fully Balanced Floating Differential

Input/Output
Inputs: 8 x 5-pin Phoenix
Outputs: 4 x 5-pin Phoenix
Input Impedance: 2.5 kΩ
Output Impedance:
– Line Level: 450 Ω differential
– Mic Level: 5 Ω differential
Maximum Input Level: +20 dBu
Maximum Output Level: +20 dBu

Physical Specifications
Form Factor: 1U Rackmount
Dimensions (W x D x H): 19 x 7.5 x 1.7 in (483 x 191 x 43 mm)
Weight: 3.6 lbs (1.6 kg)
Package Weight: 9.25 lbs
Box Dimensions: 24.4 x 14.4 x 6.7 in

Included Accessories
1 x Power Cord (Part #21499)
1 x Interconnect Cable – Black (Part #21529-1)
1 x Interconnect Cable – Red (Part #21710-1)
1 x 25-Pin Female Connector (Part #21558)
6 x 5-Position Plug (Part #21580)
1 x USB Cable (Part #21713)
1 x CAT5 Cable (Part #21716)
1 x Adjustment Tool (Part #35679)
1 x LecNet2 Software CD
1 x Manual

System Integration
Stackable: Yes (Up to 3 units)
Control System Compatibility: AMX, Crestron, and other third-party systems
Standalone Operation: Yes (No host PC needed after setup)
Software: LecNet2 GUI for configuration and monitoring (Windows-based)