8M Rear Panel - MOTU 1248 User Manual

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1. The 8M is equipped with an auto-switching interna-
tional power supply.
2. BNC word clock jacks. Use them for a variety of applica-
tions, such as digital transfers with devices that cannot
slave to the clock supplied by their digital I/O connection
with the 8M.
3. These ADAT optical "lightpipe" jacks provide 16 channels
of 24-bit ADAT optical digital I/O at 1x sample rates (44.1
or 48 kHz) and 8 channels at 2x sample rates (88.2 or 96
kHz). They are disabled at higher sample rates. The IN
and OUT ports on the right provide channels 1-8 (or 1-4),
and the left-hand ports provide channels 9-16 (or 5-8).

8M Rear Panel

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4. The 8M's eight analog outputs are balanced TRS quarter-
inch connectors that can also accept an unbalanced plug
(with the ring disconnected). They are equipped with
very high quality 24-bit 192 kHz converters. The output
trim can be adjusted from the Output Setting section of
the Device Tab in the MOTU Pro Audio Control web app
software.
5. These XLR/TRS combo jacks accept either a mic cable or a
quarter-inch cable, balanced or unbalanced, from a
guitar or line input. Use the front panel controls to adjust
individual preamp gain, 48V phantom power, and an
optional -20 dB pad for each mic input. The quarter-inch
plug is equipped with a high-impedance circuit for
guitar input.
6. Connect the 8M to the computer here via either
Thunderbolt or USB 2.0, using a standard Thunderbolt or
USB cable. For details, see "Setup for multiple Thunder-
bolt and USB interfaces" on page 46.
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7. This AVB Ethernet port provides industry standard IEEE
802.1 network connectivity to other network devices.
Examples include:
Another 8M or any other MOTU AVB-equipped audio
■
interface, such as the 1248, 8M, 16A, 24Ai, 24Ao, 112D,
Monitor 8, etc.
A standard Ethernet hub or Wi-Fi router (for internet
■
connection and communication with the MOTU Pro
Audio Control web app software).
■ A standard AVB Ethernet switch for high-speed, low-
latency, high-capacity audio connectivity to an AVB
audio network.
■ A recent-generation Mac (any Mac with a Thunderbolt
port) running OS X El Capitan (10.11) or later. This
allows you to operate the 8M as an audio interface over
Ethernet.