GROUND ZERO GZRA 4HD
RADIOACTIVE SERIES
Specifications
Model
GZRA 4HD
Amplifier type
4 channel class D
RMS Power @ 4
Ω
CEA Standard CEA-2006-A
4x 175 W
(1% THD+N)
RMS Power @ 2
Ω
CEA Standard CEA-2006-A
4x 275 W
(1% THD+N)
RMS Power @ 4
Ω
in bridged mode
CEA Standard CEA-2006-A
2x 550 W
(1% THD+N)
2x 700 W
(10% THD+N)
Low pass filter
40 Hz – 4000 Hz (12 dB/oct)
High pass filter
40 Hz – 4000 Hz (12 dB/oct)
Frequency response
10 Hz – 25 kHz
Signal to noise ratio (SNR)
-102.3 dB
Total harmonic distortion (THD+N)
< 0.1%
Damping factor
> 200
Input sensitivity
200 mV – 5.3 V
Fuse(s)
3x 35 A
Recommended main fuse
100 A
Dimensions
w x h x l (heatsink / overall)
186 x 52 x 229/268 mm
Dimensions
w x h x l (heatsink / overall)
7.32 x 2.05 x 9.02/10.55“
Trouble shooting guide
Symptoms
Check / Cause
Action
No audible sound
Does the POW LED turn to green?
Check protection fuse(s) of the amplifier (harness)
Check remote wire connection (RCA input mode)
Check +12 Volt power supply wire connection
Check ground wire connection
Did the PROTECT LED turned to red?
Check for speaker short or amplifier overheating
Device does not
turn on
Power supply of the amplifier?
Check power wire or connections
Remote wire powered? (RCA input
mode)
Check remote wire connection to the head unit
No sound on one
channel
Speaker wiring undamaged?
Check for short circuit or open connections
Input signal on each RCA lead?
Reverse left and right RCA inputs to check the
audio input signal
Device turns off at
medium / high
volume
Load impedance of each speaker
correct?
Check if each speaker load impedance matches
the technical specifications of the amplifier
Status LED turned
on red
Temperature protection circuit active
Decrease head unit’s volume / wait for cooling
Speaker wires short / speaker
damaged
Check speaker / wires and insulate if necessary
