User Manual

POWER/PROTECT LED

Amplier status indicator. Blue indicates all systems working and amplier is on. Red

indicates protection mode, from Thermal or Short Circuit. (See Troubleshooting)

GROUND (GND)

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. Bad grounds account for 90% of

amplier issues, make sure the amplier is grounded correctly and securely.

REMOTE (REM)

Connect to switched +12V, usually a trigger wire coming from the head unit or an

ignition lead if one is not available.

+12V

This must be connected to the fused positive terminal (+12V) of the car’s battery. A fuse

must be located within 18 inches of the battery to protect the vehicle and should be

fused at, or above, the ampliers fuse rating.

SPEAKER OUTPUT

Used to connect the amplier to speakers. The GX1200.0 minimum impedance is 1

Ohms

INPUT GAIN (SENS)

Used to adjust the input sensitivity to match the input level signal. Continuously

variable from 0.4V to 10V. Adjust this with the help of a DMM and a test signal or an

Oscilloscope. See System Tuning section for basic setup instructions.

PHASE

Controls the Phase from 0-180°. Properly adjusting phase will allow enhanced bass

response, dynamics and impact at any volume.

2 3 4

GX1200.1

Monoblock Power Amplier