RME Fireface UCX II 40-Channel USB-B Audio/MIDI Interface - Manual (Page 42)

42 User's Guide Fireface UCX II © RME
20. Analog Outputs
20.1 Line
The short circuit protected, low impedance line outputs of channels 1 to 6 are available as 1/4"
TRS jacks on the back of the unit. The electronic output stage is built in a servo balanced design
which handles unbalanced (mono jacks) and balanced (stereo jacks) correctly.
To maintain an optimum level for devices connected to the analog outputs, the Fireface UCX II
internally uses hi-quality electronic switches, which allow for a perfect adaptation of all outputs
individually to the three most often used studio levels.
As with the analog inputs, the analog output levels are defined to maintain a problem-free opera-
tion with most other devices.
Reference 0 dBFS @ Older RME units
+19 dBu +19 dBu Hi Gain/Lo Gain (15 dB HR)
+13 dBu +13 dBu +4 dBu (9 dB HR)
+4 dBu +4 dBu -10 dBV (12 dB HR)
In older RME devices, the references refer to a working level plus headroom (HR). In the UCX II
the maximum level is used as name instead, which is less confusing in our opinion. The levels of
the table are identical in each respective case and thus fully compatible.
20.2 Headphones / Line Out
Channels 7/8 of the Fireface are available on the front as 1/4" TRS jack. These channels use
the same converters as the other Line outputs, therefore offer the same technical data.
Two hardware-based reference levels are available (set in TotalMix Output Channel Settings,
Level, High or Low). High equals the setting +19 dBu of the other channels, Low equals +4 dBu
(see table above). They can thus also be used as high-quality, unbalanced line outputs.
These outputs are special low impedance types (1 Ohms), perfectly suited for headphone use.
Setting the output level, i.e. the monitoring volume, is done
– besides the pre-setting High/Low -
via TotalMix (Hardware Output, Phones) or directly at the unit via the encoder. Changing the
monitoring volume is therefore very easy and quickly done.
In case the Phones output should operate as
line outputs, an adapter TRS plug to RCA
phono plugs, or TRS plug to TS plugs is re-
quired.
The pin assignment follows international
standards. The left channel is connected to
the tip, the right channel to the ring of the
TRS jack/plug.