User Manual
Apollo 8 Hardware Manual Front Panel 10
Front Panel
This section describes the features and functionality of all controls and visual elements
on the Apollo 8 front panel.
Note: All front panel functions (except the METER switch, headphone volume
knobs, and power switch) can be controlled remotely with the included Console
software application. Changes made with the front panel controls are mirrored in
the Console application, and vice versa.
Apollo 8 front panel (left portion)
(1) Hi-Z Inputs 1 & 2
The Hi-Z (high impedance) JFET direct inputs are for connecting low-level passive
devices such as electric guitar and bass instruments into channels 1 & 2 for A/D
conversion. Hi-Z input gain levels are adjusted with the Preamp control for the
associated channel.
The Hi-Z inputs have a default input impedance of 1M Ohms. The input impedance may
vary when Unison plug-ins are inserted on the channel within the Console application.
For details, see the Unison chapter in the Apollo Software Manual.
Note: Connect only ¼” unbalanced TS mono phone plugs to the Hi-Z inputs. TRS
stereo plugs cannot be used.
Automatic Input Detection
Hi-Z inputs 1 & 2 use the same A/D converter channels as the corresponding Mic 1 &
2 and Line 1 & 2 inputs. When a device is plugged into a Hi-Z input, the Mic and Line
inputs for the channel are overridden, the Mic/Line switch for the channel has no effect,
and the stereo link is severed (if active).
Important: To use Mic or Line inputs 1 or 2, its corresponding Hi-Z input must be
disconnected.
MONITOR
PREAMP
21
POWER
HEADPHONES
PAD
INPUT
+48V
Ø LINK
METER
ALT
FCN
OUT
HI-Z 1 HI-Z 2
OFF
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
1 2 3 4 5 6 7 8
CLIP
0
-6
-3
-9
-12
-15
-18
-21
-27
LINE
Hi-Z
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
1 2 3 4 5 6 7 8
CLIP
0
-6
-3
-9
-12
-15
-18
-21
-27
MIC
Hi-Z
INPUT
4 5 7
2 3 11
13
1716 18 19
20 22
23
24
26
25
21
12
14
1
10
6 8 9
15
1 2 3 4