Universal Audio Apollo x4 User Manual

Apollo x4 Hardware Manual Controls & Connectors 19
Controls & Connectors
Complete details about the Apollo x4 hardware controls and all connector jacks on the
front and rear panels are provided in this chapter.
Note: To learn how to set input gain levels (MIC, LINE, and Hi-Z) and output
volumes (monitors and headphones), see Setting Hardware I/O Levels in the Quick
Start chapter.
Controls Overview
Some Apollo x4 controls have multiple functions. The function of each control depends
on the current operating mode and the current settings within that mode. To control a
particular function, the control must be activated.
Operating Modes
Apollo x4’s top panel has two operating modes: Preamp and Monitor. The function
and availability of the top panel controls vary depending on the active operating mode.
The active mode is selected with the PREAMP and MONITOR buttons. Each mode is
explained in greater detail below.
Note: All top panel functions can be operated concurrently (without switching
modes) from within the companion Console software application. See the Apollo
Software Manual for details.
PREAMP Mode
When Apollo x4 is in Preamp mode, the top panel controls are related to input
functions only. To adjust input functions, press the PREAMP button to enter
Preamp mode and activate the input channel controls.
Important: Apollo x4 must be in Preamp mode to change preamp gain
levels and other input options.
Note: Output functions (monitor and headphone) cannot be performed in Preamp
mode. Press the MONITOR button to perform output functions.
Preamp Channels
Apollo x4 has four independent analog input channels for A/D conversion. Each input
channel has a preamplifier. The input channel preamplifiers are independently controlled
when in Preamp mode.
Preamp Controls
Apollo x4 has one set of preamp input channel controls. The input channel controls
adjust all preamp functions for the currently selected input channel only.
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