Universal Audio Apollo x4 User Manual

Apollo x4 Hardware Manual Controls & Connectors 20
Selected Channel
The currently selected input channel (CH1, CH2, CH3, or CH4) is
shown by the Select Channel Indicators at the upper left of the main
display panel, above the input meters. When a channel is selected,
its indicator is lit.
Note: The preamp controls adjust the functions for the currently selected channel.
Changing Channels
When in Preamp mode, press the PREAMP button repeatedly to change the selected
input channel so its controls can be adjusted.
Input Source
The Mic, Line, or Hi-Z input source is routed into the channel’s
preamplifier. The active input source jack is shown by the indicators
between the input meters. When an input is selected, its indicator is lit.
The MIC (XLR) or LINE (¼”) combo inputs on the rear panel are selected
by the pressing the INPUT button when the channel is selected. The HI-Z
input (available on channels 1 and 2 only) is selected automatically when
an instrument cable is plugged into a Hi-Z input on the front panel.
Note: Only one input jack at a time (Mic, Line, or Hi-Z) can be used as a
channel’s input source.
Preamp Gain
The Level knob adjusts the amount of preamp gain (input signal level) for the currently
selected input channel.
Preamp Options
Each input channel has a set of preamp
options. The preamp options for the currently
selected input channel are activated using the
row of six buttons when in Preamp mode.
The current state of the preamp options are indicated in the upper row of the options
display area above the six option buttons. Available options are dim when inactive, bright
when enabled, and unlit when unavailable.
Note: Not all preamp options are available with all input types. For specific
details, see the Top Panel Controls section later in this chapter.
MONITORPREAMP
MONITORPREAMP
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
1 2 1 2
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8
7
12
5
6
9 10 11
161718
21
20
19
15
13 14
1 2
MONITORPREAMP
MONITORPREAMP
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
1 2 1 2
a b c d e f
g h i j k l
43
8
7
12
5
6
9 10 11
161718
21
20
19
15
13 14
1 2
MONITORPREAMP
MONITORPREAMP
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
OPTICAL
OUT IN
OFF ON
12VDC
POWER
1
2 R
LINE OUT MONITOR
3
4
LINE OUT
MIC/LINE 4 MIC/LINE 3 MIC/LINE 2 MIC/LINE 1
L
1 2 1 2
a b c d e f
g h i j k l
43
8
7
12
5
6
9 10 11
161718
21
20
19
15
13 14
1 2

Universal Audio Apollo x4 Specifications

General

Audio Interface Type	Thunderbolt 3
Number of Preamps	4
A/D Resolution	24-bit/192kHz
DSP	Yes
Phantom Power	Yes
Simultaneous I/O	12 x 18
Preamp Type	Unison
Software Compatibility	macOS, Windows
Power Supply	External Power Supply
Analog Inputs	4 x XLR/TRS combo
Analog Outputs	2 x Monitor TRS, 4 x Line TRS
Digital Inputs	ADAT, S/PDIF
Digital Outputs	ADAT, S/PDIF
Headphone Outputs	2