8
Onyx 820i
Line-level Sources and Guitars
Connect your line-level sources to the 1/4" TRS
connectors. Channels 1 and 2 have mono inputs, and
channels 3-4, 5-6, and 7-8 are stereo. Each input can
accept TRS balanced or TS unbalanced sources.
Line-level sources include keyboards, drum machines,
electronic drum kits, CD players, iPod
®
docks, guitar
preamp outputs and so on.
If you just have a mono source and the mono channels
are already in use, plug it into the left input (labeled
left/mono) of the stereo channels, and the signal will
appear equally on the left and right of the main mix.
If you have a stereo source and want to use channels 1
and 2, plug the left side into channel 1, and set the pan
control fully-left. Plug the right side into channel 2 and
set the pan control fully-right.
Channels 3-4 have a +4/–10 dB switch that allows
them to accept line-level inputs from +4 dBu or
–10 dBV devices.
LINE/HI-Z
Engage this switch if you want to connect guitars
directly to the 1/4" line inputs of channels 1 or 2.
For line-level sources, disengage this switch.
To connect guitars to other channels, you will need a
DI box, or they will not sound good, particularly the high
frequency response. This applies to most mixers and
channels in general, unless they have a hi-z switch
LOW CUT
Channels 1 and 2, and channels 3-4 have a low-cut
switch that cuts bass frequencies below 75 Hz.
The low cut of channels 1 and 2 affects the line and
the mic inputs. The low cut of channels 3-4 affects the
mic input only.
EQUALIZATION
Mono channels 1 and 2 have a 3-band EQ, with
shelving-low, peaking-mid, and shelving-high controls.
The mid frequency is adjustable from 100 Hz to 8 kHz.
Hybrid channels 3-4 have a stereo 4-band EQ, with
shelving-low, peaking low-mid, peaking high-mid, and
shelving-high controls.
Stereo channels 5-6 and 7-8 have a stereo 3-band EQ
with shelving-low, peaking-mid, and shelving-high.
These EQ options allow a lot of adjustment to your
line-level sources and guitars. Apply EQ wisely and
carefully, like makeup. (Too much and things can turn
ugly.)
TAPE IN and TAPE OUT
Use these RCA unbalanced stereo inputs to connect
the line-level outputs from sources such as tape decks,
CD/DVD players and iPod
®
docks. Engage the tape
switch to listen in your control room or phones. Engage
assign to main mix to add the sounds to the main mix,
for example you can play intermission music, or listen to
rare reference material of your band getting it right.
The tape output is a copy of the main mix (post
fader), suitable for analog recording, sending to the
inputs of an external amplifi er, or sound card etc.
SETTING THE CHANNEL GAIN
1. Press the solo switch at the bottom of the
channel your source is connected to. The rude
solo light will fl ash to remind you that the
source playing in the control room,
headphones, and the right main meter is the
soloed channel.
2. Play your source at typical loudness levels.
3. Adjust the channel gain control until the right
main meter level is hovering around the 0 dB
mark (labeled "level set").
4. Now the gain is set correctly, disengage solo.
5. The channel 3-4 gain control only affects the
mic input. For channel 3 and 4 line-level inputs,
follow steps 1 and 2, then if the right meter
seems a bit low, engage the –10 dBV switch.
MUTE
SOLO
48V
MUTE
SOLO
48V
MUTE
SOLO
48V
LINE
MUTE
SOLO
MUTE
SOLO
TAPE
PAN
2
1
MID
FREQ
MID
FREQ
BAL/UNBAL
BAL/UNBAL
ALT 3-4
ALT 3-4
ALT 3-4
ALT 3-4
ALT 3-4
LOW
MID
400Hz
ONY
X MIC PR
E
HIGH
12kHz
LOW
80Hz
EQ
INSERT
INSERT
ONY
X MIC PR
E
HIGH
12kHz
LOW
80Hz
EQ
ON
YX MIC PRE
HIGH
12kHz
HIGH
MID
2.5KHz
LOW
80Hz
EQ
AUX MASTER
2
1
SEND
RETURN
2
1
EQ
MAIN MIX
(MONO)
L
R
L
R
L
(MONO)
R
BAL/UNBAL
L
(MONO)
R
BAL/UNBAL
L
(MONO)
R
BAL/UNBAL
TAPE
IN
OUT
L
R
AUX RETURN
1
2
1
2
AUX SEND
MAIN OUT
CTRL ROOM/PHONES
SOURCE
PHONES
CONTROL
ROOM
MID
2.5kHz
LOW
80Hz
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
U
+
15
-15
HIGH
12kHz
MID
2.5kHz
LOW
80Hz
HIGH
12kHz
RUDE
SOLO
20
15
10
6
3
0
2
4
7
10
20
30
L
R
0dB=0dBu
LEVEL
SET
CLIP
MIC
PRE
POST
PRE
POST
FW 1-2
LINE
HI-Z
LINE
-10dB
+
4dB
HI-Z
LINE
PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE
PRE
POST
PRE
POST
PRE
POST
PRE
POST
LEVEL
LEVEL
LEVEL
LEVEL
LEVEL
+10dB
O
O
U
+10dB
O
O
U
+10dB
O
O
U
+10dB
O
O
U
+10dB
O
O
U
+10dB
O
O
U
1
2
3-4
LINE IN 5-6
LINE IN 7-8
AUX
PAN
2
1
AUX
PAN
2
1
AUX
PAN
2
1
AUX
PAN
2
1
AUX
RTN TO
AUX1
AUX SEND 1-2
TO FW 5-6
ASSIGN TO
FW 7-8
MAIN MIX
AUX 1-2
PHONES
DESTINATION
LEVEL
O
O
MAX
OL
- 20
OL
-
20
-
20
OL
OL
-
20
OL
-
20
1
2
TALKBACK
BAL/UNBAL
BAL/UNBAL
BAL/UNBAL
SEND
SEND
SEND
SEND
SEND
INPUT
POWER
ALT 3-4
FW 1-2
ASSIGN TO
MAIN MIX
3-4
5-6
7-8
GAIN
+
20dB
-
20dB
U
GAIN
MIC
GAIN
GAIN
+
20dB
-
20dB
U
U
20
30
40
60
+
40dB
U
-20dB
U
20
30
40
60
GAIN
+
40dB
U
-20dB
U
20
30
40
60
1
LINE
2
LINE
1k
100
8k
1k
100
8k
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
+
15
O
O
+
15
O
O
+
10
O
O
+
10
O
O
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
MAX
O
O
L
R
L
R
L
R
L
R
L
R
Stereo Line-Level Inputs
Gain
Low Cut
EQ
Inserts
Mono Line
Inputs
Line/Hi-Z
Tape Tape In/Out
Level
Set
Solo
