Marshall Electronics : AR-DM21
16 Channel Digital Audio Monitor – 1RU Mainframe
Broadcast, Industrial & Security Products
Description
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.
Features
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
Specifications
| 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 |
Resources & Documents
| ar-dm21.pdf | Datasheet |