GROUND ZERO GZRA 4HD
RADIOACTIVE SERIES
Controls & Features
1
Power terminal
+12V
To be connected to the positive terminal of the battery
REM
To be connected to the remote output of the head unit*
(*not required in high-level input mode)
GND
To be connected to the vehicle´s ground
(or directly to the negative terminal of the battery)
2
Fuse(s)
If necessary to replace a defective fuse, it´s strongly recommended to
use a fuse with identical value
3
Speaker terminal
To connect the speaker wires / min. 2 ohms stereo or 1 ohm bridged
4
Input mode switch
(RCA)
To select between 4 channel or only 2 channel input mode according
to the quantity of RCA wires available from the head unit
5
Line input (RCA)
Input sockets to connect RCA wires
Important note: High-level and RCA inputs should never be used
simultaneously! This may cause serious damage to the amplifier
6
High-level input
Head units without RCA pre-amplifier output signal can be connected
using the high-level input to connect the speaker output of the head
unit directly.
If used, the amplifier turns on automatically (auto-on feature)
The remote input of the power supply terminal remains unused
Important note: High-level and RCA inputs should never be used
simultaneously! This may cause serious damage to the amplifier
7
Sensitivity control
Controller to adjust the input sensitivity (CH 1/2 & CH 3/4)
8
Low pass filter
To adjust the required crossover point. Frequencies above the selected
crossover point will be filtered (40 Hz to 4000 Hz) (CH 1/2 & CH 3/4)
9
High pass filter
To adjust the required crossover point. Frequencies below the selected
crossover point will be filtered (40 Hz to 4000 Hz) (CH 1/2 & CH 3/4)
10
Status indication
POWER (green) ok (correct operation)
PROTECT
(red) error (protection mode)
