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Rear Panel Features
Note: AR-DM2X-X audio monitor shown with 3 modules: ARDM-AES-BNC, ARDM-AES-XLR, ARDM-AA-8XLR
Power Input Connector
Use only the included power supply to power the AR-DM2X-X audio monitor. The AR-DM2-1 and AR-DM21-B use
Power Supplies with 4-Pin XLR connectors providing 12-24 VDC, while the AR-DM22-B can use a universal AC Input
(110-230 VAC).
USB Port
The USB port is used to upgrade firmware to the AR-DM2X-X audio monitor. Additionally, the USB port can be used to
configure LKFS settings with USB memory stick.
Contact Marshall Electronics regarding available firmware upgrades and instructions.
I/O Module Slots
Four slots are available for a variety of I/O modules. See page 13 for available modules.
Ethernet Port
The Ethernet port is used to configure several aspects of LKFS monitoring. Connecting the Ethernet port to your
network provides the ability to get current time from a NTP server, to export LKFS data to an FTP server or send
emails with LKFS data. Contact Marshall Electronics for further information on this feature.
10
DOLBY Downmix Configurations
The following table shows the available downmix configurations and corresponding channel assignments for common
DOLBY E program configurations (PGM) and DOLBY DIGITAL audio coding modes (ACM).
DOLBY Type
PGM / ACM
Available Presets
1/1 5.1
1/1 Lo+Ro/Lo+Ro
1/1 L/R
1/1 C/C
5.1
1/1 Ls/Rs
1/1 LFE/LFE
1/1 Lt/Rt
1/1 L+C/R+C
1/2 5.1
1/2 Lo+Ro/Lo+Ro
1/2 L/R
1/2 C/C
1/2 Ls/Rs
5.1+2
1/2 LFE/LFE
1/2 Lt/Rt
1/2 L+C/R+C
2/2 Stereo Ch.
2/2 L+R/L+R
DOLBY E
1/2 Stereo Ch.
1/2 L+R/L+R
2+2
2/2 Stereo Ch.
2/2 L+R/L+R
1/3 Stereo Ch.
1/3 L+R/L+R
2/3 Stereo Ch.
3x2
2/3 L+R/L+R
3/3 Stereo Ch.
3/3 L+R/L+R
1/8 Mono Ch.
2/8 Mono Ch.
3/8 Mono Ch.
4/8 Mono Ch.
8x1
5/8 Mono Ch.
6/8 Mono Ch.
7/8 Mono Ch.
8/8 Mono Ch.
Default
Lo+Ro/Lo+Ro
L/R
C/C
3/2L
Ls/Rs
LFE/LFE
Lt/Rt
L+C/R+C
Default
DOLBY DIGITAL
Lo+Ro/Lo+Ro
L/R
3/2
C/C
Ls/Rs
Lt/Rt
L+C/R+C
L/R
2/0
C/C
1/0
C/C
C: Center (Left Speaker + Right Speaker)
DOLBY Decoding (continued)
Channel Assignments
Ch. 1
Ch. 2
Ch. 3
Ch. 4
Ch. 5
Ch. 6
Ch. 7
L
R
C
C
L
R
-
C
C
C
C
C
C
-
L
R
-
-
-
-
-
-
C
-
-
-
-
-
-
-
-
L
R
-
-
-
-
C
-
L
R
C
C
L
R
-
L
R
C
-
-
-
-
L
R
C
C
L
R
-
C
C
C
C
C
C
-
L
R
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
-
L
R
-
-
-
-
C
-
-
-
L
R
C
C
L
R
-
L
R
C
-
-
-
-
-
-
-
-
-
-
L
-
-
-
-
-
-
C
L
R
-
-
-
-
-
C
C
-
-
-
-
-
-
-
-
-
-
-
L
-
-
-
-
-
-
C
L
R
-
-
-
-
-
C
C
-
-
-
-
-
-
-
-
-
-
-
R
-
-
-
-
-
-
C
-
-
R
L
-
-
-
-
-
C
C
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
L
R
C
C
L
R
-
C
C
C
C
C
C
-
L
R
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
-
L
R
-
-
-
-
C
-
-
-
L
R
C
C
L
R
-
L
R
C
-
-
-
-
L
R
C
-
L
R
-
C
C
C
-
C
C
-
L
R
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
-
L
R
-
L
R
C
-
L
R
-
L
R
C
-
-
-
-
L
R
-
-
-
-
-
C
C
-
-
-
-
-
C
-
-
-
-
-
-
L: Left Speaker
R: Right Speaker
Ch. 8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
R
C
-
-
R
C
-
-
L
C
-
-
-
-
-
-
-
-
-
C
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
15
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