Phoenix Gold • www.phoenixgold.com
Amplifier Owner’s Manual
FRONT AND REAR INPUTS
Connect preamp signal cables from headunit to these inputs. The front
AND rear inputs must be used, if only the front input is used then the rear
speaker outputs will have no output signal.
CROSSOVER FREQUENCY
Controls the crossover point for the speaker outputs.
SENS
Used to reach maximum amplifier power with a wide variety of headunits.
CONFIG
FLAT: Crossovers are turned off
HP: High pass crossover is on
LP: Low pass crossover is on
+12V
This must be connected to the fused positive terminal (+12V) of the car’s
battery. The fuse must be located within 18 inches of the battery.
REMOTE
This must be connected to sw12V, usually a trigger wire coming
from the head unit or ignition.
GROUND
This must be connected to the negative terminal of the car’s battery or
bolted to a clean, unpainted part of the chassis of the vehicle.
REMOTE MONITORING DISPLAY (RMD)
Connect optional RMD Voltage Display to this port.
SPEAKER OUTPUTS
Used to connect the amplifier to speakers. RX400.4’s minimum impedance
is 4 ohms bridged or 2 ohms stereo. Use the Right + and Left - to bridge
the channels.
Note: RX400.4 contains a cooling fan located on the power endpanel.
RX400.4
4 Channel Power Amplifier
