Owner's Manual

15
RS232 u
The RA-1572 can be controlled via RS232 for integration with automation
systems. The RS232 input accepts a standard straight DB-9 Male-to-Female
cable.
For additional information on the connections, software, and operating codes
for RS232 control of the RA-1572, contact your authorized Rotel dealer.
Rotel Link
o
See Figure 7
The ROTEL LINK OUT connection can be made with the stereo 3.5 mm cable
(supplied) to a Rotel product with ROTEL LINK IN connection including a
CD player.
These allow the attached Rotel products to communicate with each other and
be controlled via the Rotel App (available for download on the iTunes
®
store).
NOTE: Only the Rotel Link cables supplied with this product should be
used. These 3.5 mm cables have WHITE connector ends and should
not be confused with the 12 Volt Trigger cables that have BLACK
connector ends.
EXT REM IN Jack
p
This 3.5mm mini-jack receives command codes from industry-standard infrared
receivers via hard-wired connections. This feature could prove useful when
the unit is installed in a cabinet and the front-panel sensor is blocked. Consult
your authorized Rotel dealer for information on these external repeaters and
the proper wiring of a jack to t the mini-jack receptacle.
Network Connection
t
The RA-1572 can be attached to a network using the rear panel NETWORK
socket t. The NETWORK congurations allow both STATIC and DHCP
IP addressing. See the Network section of this manual under Setting Menu
for IP address conguration information.
The NETWORK connection allows software updates to be downloaded from
the Internet. The NETWORK connection also allows IP control for integration
with automation systems.
For additional information on the IP control please contact your authorized
Rotel dealer.
Protection Circuit
The amplier has both thermal and over-current protection circuitry that
protects the amplier against damage in the event of extreme or faulty
operating conditions. The protection circuits are independent of the audio
signal and have no impact on sonic performance. Instead, the protection
To temporarily change the display brightness, press the DIM B button on
the remote.
POWER LED Dimmer
9
To change the brightness of the Power LED and the two Speaker Selector
LEDs on the front panel, press the MENU
9
button to toggle to the POWER
LED Setting. Then press the - or + button on the front panel to change the
brightness.
Valid settings include: BRIGHT, MID, DIM.
NOTE: This setting is saved permanently including after powering off
the RA‑1572.
PC‑USB Input r
See Figure 4
Connect this input using the supplied USB cable to the USB socket of your
computer.
The RA-1572 supports both USB Audio Class 1.0 and USB Audio Class
2.0 modes. Windows computers do not require installation of a driver for
USB Audio Class 1.0 and support playback of audio up to 96kHz sampling
rates. The Factory Default setting is USB Audio Class 1.0.
To take advantage of USB Audio Class 2.0 audio playback supporting
up to 384kHz sampling rates you will need to install the Windows driver
supplied on the CD included with the RA-1572. You will also need to switch
the RA-1572 to USB Audio Class 2.0 playback mode with the following:
• Press MENU on the front panel until “PC-USB AUDIO CLASS” appears
on the display.
• Select “2.0” using the “-” button then press “ENTER”.
• Power cycle the RA-1572 and reboot your PC after changing the USB
Audio mode to ensure both units are properly congured.
Many audio playback applications do not support 384kHz sampling rate.
Please conrm your audio player supports 384kHz audio and you have
384kHz audio les to properly playback this sample rate. Also, you may
need to congure the audio driver in your PC to output 384kHz or your
computer may “down sample” to a lower audio sample rate. For more
information please refer to your audio player or operating system information.
NOTE: USB Audio Class 2.0 requires installation of the Windows PC
driver on the CD ROM included with the RA‑1572.
NOTE: MAC computers do not require a driver to support PC‑USB
1.0 or 2.0 audio.
NOTE: Upon successful installation of the driver, you may need to select
the ROTEL audio driver from the audio/speaker setup of your computer.
NOTE: The RA‑1572 supports both DSD and DOP audio playback
in 1X and 2X formats. Consult your audio player to conrm proper
operation for playback of these audio formats.