Rockford Fosgate 250 2-Channel, 360 2-Channel, 400 4-Channel, 500 2-Channel, 600 5-Channel, 800 2-Channel, 800 4-Channel, 1000 2-Channel Installation And Operation Manual page 22

Installation
Power 400 4-channel
Power 800 4-channel
Power Connections
*Keep grounds as short as possible
LED
REM
B+
Connect to remote
turn-on lead of
source unit
Less than 18"
+ -
Connect to B+ of battery
with appropriate fuse
– 16 –
Power 400
4 -channel
GND
Connect to chassis
ground of vehicle*
I
+ -
+ -
N
S
T
A
L
L
A
T
I
O
N
Power 800
4 -channel