RME Fireface UCX II 40-Channel USB-B Audio/MIDI Interface - Manual (Page 41)

User's Guide Fireface UCX II © RME
41
19.3 Instrument / Line Front
Inputs 3/4 of the Fireface UCX II are exceptionally flexible. Several gain and impedance options
make them the ideal receivers for both line and instrument signals.
Line
Inputs 3/4 have balanced line inputs as 1/4" TRS jacks. The electronic input stage is built in a
servo balanced design which handles unbalanced (mono jacks) and balanced (stereo jacks)
correctly, automatically adjusting the level reference.
Inputs 3/4 operate in perfect harmony with the rear inputs 5 to 8, as they are identical in all tech-
nical specifications.
Adjustable Input Gain
Via Gain in TotalMix channel settings, or by using the rotary encoder on
the front, an additional gain can be applied to the input signals of chan-
nels 3/4. The gain range is 0 dB up to 12 dB, in steps of 0.5 dB. This
option not only allows for the use of sources with low level output signals,
but also for example to adjust the balance between channel 3 and 4 pre-
cisely, already before the recording takes place.
Two reference levels plus 12 dB adjustable gain offer universal connec-
tivity. Be it keyboards, samplers, CD players or what ever one likes to
connect: These inputs handle levels from +1 dBu up to +19 dBu and also
perfectly handle your
Instrument
The main difference between a line- and instrument input is the input's
impedance. Via the option
Inst in the TotalMix channel settings, the input
impedance changes from 10 kOhm to 1 MOhm (also called Hi-Z). At the
same time the input sensitivity rises by 6 dB.
The instrument input operates unbalanced
. Please don’t use (stereo) TRS jacks in that mode.
For
AutoSet please read chapter 19.2.