System block diagram, Connector types, Input connections – Allen&Heath PA20-CP User Manual
Page 33: Output connections, Insert connections, Type impedance sensitivity, Type impedance level, Type level, Pa-cp user guide 33
PA-CP User Guide
33
System Block Diagram
Connector Types
XLR connector :
Pin 2 = hot (+) Pin 3 = cold (-) Pin 1 = GND
TRS input and output connectors :
Tip = hot (+) Ring = cold (-) Sleeve = GND
Input Connections
Type
Impedance
Sensitivity
Mono MIC IN
Balanced XLR female
2k ohm
-63 to +5dBu
Mono LINE IN
Balanced TRS jack
>30k ohm
-25 to +10dBu
ST1,3 LINE IN L,R
Unbalanced RCA phono
>10k ohm
-10dBu max
ST2,4 LINE IN L,R
Unbalanced TRS jack
>10k ohm
-10dBu max
2-TRK IN L,R
Unbalanced RCA phono
>10k ohm
0dBu
EXT FX IN L,R
Unbalanced TRS jack
>10k ohm
0dBu
AMP IN
Unbalanced TRS jack
>10k ohm
0dBu
Output Connections
Type
Impedance
Level
L, R, MONO,
Impedance balanced TRS jack
<75 ohm
0dBu
A, B SLAVE OUT
Impedance balanced TRS jack
<75 ohm
0dBu
FB1, FB2, AUX, FX OUT
Impedance balanced TRS jack
<75 ohm
0dBu
2TRK
OUT Unbalanced
RCA
phono
<75
ohm
0dBu
2TRK OUT (SPDIF)
RCA phono
75 ohm coax
digital
HEADPHONES
Tip = L Ring = R 30 to 600 ohm, 100 ohms recommended
SPEAKER A, B
Speakon pin1+ = speaker positive, pin1- = speaker negative
Minimum 4 ohms. Do not bridge or common the pins
Insert Connections
Type
Level
Channel, LR
Unbalanced TRS tip = send, ring = return
0dBu
+
-
GAIN
LM
HM
HF
4 BAND EQUALISER
MONO CHANNEL
100Hz
MIC IN
PP
FADER
PFL
PEAK
STEREO CHANNEL
FX
AUX
FB2
FB1
LF
ST2/4
R
L
R
L
GAIN
ST1/3
+
+
-
LINE IN
+48V
INSERT
MUTE
PAN
DIR OUT
GAIN
LR
SUM
HF
2 BAND EQUALISER
LF
FADER
PFL
PEAK
FX
AUX
FB2
FB1
MUTE
BAL
SUM
+
SUM
EXT FX IN
R
L
GAIN
+
SUM
FADER
PFL
PEAK
FB2
FB1
MUTE
+ SUM
+
SUM
FX MUTE FOOTSWITCH
FX CHANNEL
INTERNAL FX
SELECT 1-16 / OFF
L INSERT
R INSERT
FADERS
+
SUM
MUTE
L
R
R
L
2TRK IN
PRE
POST
R
L
ANALOG
ADC
2TRK OUT
SPDIF DIGITAL
+
SUM
MONO OUT
MAIN LR
2TRK
MONO
LEV
HPF
100Hz
SUB
FADER
MUTE
AFL
FB1 OUT
FB1
FADER
MUTE
AFL
FB2 OUT
FB2
AUX
AUX OUT
FX
FX OUT
FB2
R
+
L R
FB1
L
FB1
SOURCE SELECT
LM
HM
HF
LF
LM
HM
HF
4 BAND EQUALISER
LF
A
B
A
B
LEV
LEV
TEMP
PROTECT
SIGNAL
LIMITER
PROTECT
SIGNAL
LIMITER
STANDBY
SPK A
SPK B
AMP A
AMP B
RELAY
SLAVE OUT
AMP IN
PF
L
FX
AUX
FB
2
FB
1
R
L
PHONES
R
L
HEADPHONES
LR / 2TRK
PFL/AFL
MONITOR
CHAN
PFL
MAIN OUT
8 OHM
4 OHM
2TRK TO LR
BGM
+
SUM
METERS
SEL