High level input connections, 4 ch floating ground connections, 4 ch harness wiring for common ground connections – Pyramid Car Audio PB781X User Manual
Page 20: Lr front l r rear, Ch 1/2, Lr front r l rear, Ch 3/4
FREQ.
CH 3
LOW IN
LEVEL
MIN
MAX
CH 4
HPF
+18db
0
35
400
Hz
LPF
80
HPF
2.5k
2.5k
Hz
+18db
0
BASS
BOOST
MIN
MAX
FREQ.
CH 1
CH 2
80
Hz
35
400
Hz
LPF
HI IN
CH4 CH3
+ - - +
HI IN
CH2 CH1
+ - - +
LOW IN
BASS
BOOST
LEVEL
FULL
HPF
LPF
FULL
HPF
LPF
POWER
PROTECT
REMOTE
BASS BOOST(CH3/4)
4 CH floating ground connections
from speaker terminals
L
R
FRONT
L
R
REAR
ORANGE
ORANGE
ORANGE
ORANGE
BLACK
BLACK
BLACK
BLACK
PLEASE NOTE! If using high level inputs,
do not use the low level RCA inputs at
the same time!
CH 1/2
4 CH harness wiring for common ground connections
from speaker terminals
L
R
FRONT
R
L
REAR
ORANGE
ORANGE
ORANGE
ORANGE
BLACK
BLACK
BLACK
BLACK
CH 3/4
19
pb681X
pb881X
pb1881X
high level
input connections
4 ch amp PB681X • PB881X • PB1881X