Manual
Table Of Contents
Apollo x8p Hardware Manual Rear Panel 28
Analog I/O 
Apollo x8p rear panel (analog portion)
(33) Left & Right Monitor Outputs
These balanced ¼” TRS phone jacks are line-level analog outputs typically used for 
connection to a stereo loudspeaker monitoring system. Unbalanced ¼” TS cables can 
also be used. The Monitor Outputs are DC coupled.
The signal levels and muting at these outputs are controlled with the Monitor Level & 
Mute knob (#23). 
The Monitor Outputs can be configured to use an operating level of +4 dBu (default 
value) or -10 dBV. This option is set in the Hardware panel within the Console Settings 
window. See the Apollo Software Manual for details.
The Monitor Outputs are completely independent and separately addressable from 
the eight Line Outputs (except when ALT monitoring is configured). By default, these 
outputs are labeled MON L and MON R in Apollo’s device drivers. In the DAW, the “1–2” 
or “L–R” or “Main” outputs are routed to these outputs (these labels vary within each 
particular DAW). 
Tip: The S/PDIF output (#29) can be configured to mirror the Monitor Outputs, for 
routing the stereo monitor signal to the stereo S/PDIF input of other devices. This 
feature is set with the DIGITAL MIRROR menu in the Hardware panel within the 
Console Settings window.
MONITOR
R
L
POWER IN
+12VDC 9.0A
WORD CLOCK
75 Ω
TERM
LINE OUT 1-8 (ALT SURROUND)
LINE IN 1-8
12345678
MIC/LINE INPUT
ADAT S/MUX
UNIVERSAL AUDIO, INC.
34
28 31
36
30
35
29
32
33
INPUT
MONITOR
HI-Z 2
HI-Z 1
PAD
INPUT
+48V
Ø LINK
METER
ALT
FCN
POWER
OFF
HP 1 HP 2
4 5 72
3 11
13
17
16 18 19 20
22
23 24
26
27
252112
14
1
10
6
8
9 15
1
2 3 4
5
6 7 8










