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Marshall Electronics : AR-DM21

By: Marshall Electronics
Broadcast, Industrial & Security Products
Contact us for lowest price (800) 284-2288, (858) 565-1101,, or fax (858) 300-4193
16 Channel Digital Audio Monitor - 1RU Mainframe

The Marshall Electronics AR-DM21 is ideal for TV facilities, studios, post production, VTR bays, mobile production vehicles, satellite links, and wherever multichannel audio monitoring is required. The AR-DM21 supports 16 audio channels with four slots available for interchangeable input / output modules. This unit also provides pristine audio quality and unrivaled flexibility with 100% digital processing, Class D (digital) amplification, selectable stereo downmix modes, Dolby® Digital / Dolby® E decoding capability (with optional ARDM-D552 module), a ¼” headphone jack with Level control, and an RS-485 port for on-site firmware upgrades.

AR-DM21 features include:

  • Only 1RU (1.75")
  • 16 LED Indicators for channel presence
  • User-configurable with a variety of modules
  • 100% Digital Processing
  • Class D Audio Amplification
  • Dolby® Digital / Dolby® E Decoding (with optional ARDM-D552 module)
  • Selectable Stereo Downmix Modes
  • USB 2.0 Port enables on-site firmware upgrades
  • Ethernet port allows remote alarm monitoring
  • Balance and Volume Control
  • 1/4" Headphone Jack
HDSDI Input Module Dolby Support ARDM-D552 Module
1/4" Headphone Jack Yes
16 LED Indicators for channel Yes
Internal Speakers Yes
Modular Input Slots 4
Self-Sensing Yes
1 x SDI 75Ω BNC 16 Channels Embedded Audio
PCM,Dolby E, Dolby Digital AC3, Yes
Video Formats 525i, 625i, 720p, 1080i, 1080p
De-Embedded from SDI Yes
Sample Rates: 44.1kHz, 48kHz
Unbalanced 75Ω BNC 4 x AES/EBU Inputs
Unbalanced 75Ω BNC 4 x AES/EBU Passive Loop Outputs
Formats Professional and Consumer (SPDIF)
AES BNC Module PCM,Dolby E, Dolby Digital AC3, Yes
AES XLR Module 4 x AES/EBU Balanced 110Ω DB-25 Connector
Formats Professional and Consumer (SPDIF)
PCM,Dolby E, Dolby Digital AC3, Yes
Sample Rates: 44.1kHz, 48kHz
AA-8XLR Module 8 x Analog Balanced XLR DB-25 Connector
Reference: 0, 4, 6, or 8dBu = -20dBFS Selectable
DB-25 Pinout: GOLD-DB25-XLR-05 Break-Out Cable
AES 4 Out Module Output 4 x AES/EBU Unbalanced 75Ω BNC
Formats Professional and Consumer SPDIF
Audio Coding: PCM,Dolby E, Dolby Digital AC3,
Sample Rates: 44.1kHz, 48kHz
AA-2 Out Module Outputs 2 x Analog Balanced XLR
Reference: -20dBFS = 8dBu
Control Features Volume Control Yes
Balance Control Yes
Ethernet Yes
Memory Stick Upgradable Yes
Mute Functions Yes
Controls on front Panel Yes
SRC Switch Selector Yes
Handles Yes
Power Voltage 24 VDC
Consumption Less than 45W
Connector 4Pin XLR
Dimensions Rack Unit dimensions 18.94” x 1.75” x 7.80
Weight (Main Body) 3.7 lbs

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Prices and specifications subject to change without notice.