Owner's Manual

GROUND ZERO GZFA 1.550D
FERRUM SERIES
Controls & Features
1
Speaker terminal
To connect the speaker wires - min. load 1 ohm
2
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 mode)
GND To be connected to the vehicle´s ground
(or directly to the negative terminal of the battery)
3
Fuse(s)
Recommendation: A defective (blown) fuse needs to be replaced by a
fuse with identical value and quality
4
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
5
Line output (RCA)
Output sockets offering full range audio signal for a further amplifier
6
Line input (RCA)
Input sockets to connect RCA signal wires
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
8
Low pass filter
To adjust the required crossover point. Frequencies above the selected
crossover point will be filtered (40 Hz to 250 Hz)
9
High pass filter
To adjust the required crossover point. Frequencies below the selected
crossover point will be filtered (15 Hz to 50 Hz)
10
Phase switch
This switch can be used to reverse the phase of the audio signal
(0° / 180°) in order to adapt the connected subwoofer to the other
loudspeakers, if necessary
11
Bass Boost control
To adjust the bass boost level ( 0 to +12 dB @ 45 Hz)
12
Remote socket
To connect the wired remote control (GZCS REMOTE)
13
Status indication
POWER (green) ok (correct operation)
PROTECT (red) error (protection mode)