Ground Zero HYDROGEN SERIES User manual

HYDROGEN-SERIES
Mono Amplifier
Owner’s manual
GZHA MINI ONE-K
Features
•High-efficient class D amplifier technology
•Installer friendly dimensions
•1 ohms stable / 2 ohms (in linked configuration)
•High-level input with auto-on function
•12 dB adjustable bass boost (@45 Hz)
•Adjustable low pass filter
•Adjustable input sensitivity
•Adjustable subsonic filter
•0° / 180° Phase shift switch
•Bass remote control
•Thermal / short circuit / overload protection

2
Gerenal mounting instructions
•As a precaution, it is recommended to disconnect the vehicles battery before mounting the
amplifier. (Note: For new vehicles, disconnecting the battery might cause various errors in
your vehicle´s electric system that can be cleared only by authorized service partners of your
vehicle´s manufacturer! Please ask your service partner first before disconnecting the battery!)
•The power supply wire (+12 V) has to be protected within max. 20 cm / 8” by a main fuse
holder with a fuse value matching the recommendation for your amplifier
(Note: If there is more than one amplifier connected using this power wire, the main fuse
value must be equal to the sum of the recommended fuses of all connected devices. However,
make sure the diameter of your power wire will be sufficient for the required current!)
•If necessary, replace a defective fuse by a fuse with identical quality and value
•Never drill a hole to the vehicles gas tank or brake lines, to wirings or any other important
vehicle parts!
•Never pass wires over sharp edges or vehicle parts due avoid any kind of damage
•Keep the wiring away from the antenna and electronic devices contributing to radio reception
•Lay the power supply wiring always separated from speaker wiring to avoid disturbance
•The amplifier contains a temperature protection circuit that turns the device off in case of
overheating. After a certain cooling time, it will turn on automatically. To avoid heat build-up,
sufficient air supply for cooling must be provided. Never cover the surface of the amplifier´s
heatsink entirely
•The amplifier should NEVER be mounted onto a vibrating part or surface such as a subwoofer
enclosure. This might lead to malfunction due to loosened electrical parts inside the amplifier.
•Some amplifiers offer a high-level input option, however if a pre-amplified output (RCA) is
available (at the head unit), it is strongly recommended to make use of them.

3
Controls & Features
1
SPEAKER terminal
Speaker connection
2
POWER supply terminal
GROUND - ground terminal
REM - remote wire / not to be used together with high-level input
BATT+ - +12 Volt wire from battery terminal
3
Status LEDs
POW - green -> ok (correct operation)
PRO - red -> error / protection
4
LINE-IN (RCA input)
Input sockets to connect RCA wires - to avoid any malfunction, it is recommended to use
only high-quality RCA cables.
Attention
: High-level and RCA inputs should
never
be used
simultaneously! This may cause serious damage to the amplifier
5
LEVEL control
Controller to adjust the input sensitivity
6
BASS BOOST control
Controller to adjust the bass boost level (0 to +12 dB at 45 Hz)
8
SUBSONIC filter
To adjust the required crossover for subsonic frequencies. Those frequencies below the
selected crossover point will be filtered (10 Hz to 50 Hz).
9
LOW-PASS (LPF) control
To adjust the required crossover point. Frequencies above the selected crossover point will
be filtered (30 Hz to 250 Hz)
10
HIGH LEVEL input
As an alternative to the RCA input (4), the high-level input can be used to connect the
speaker output of the head unit directly. The amplifier turns on automatically (Auto-On) while
the REM (remote) input of the power supply terminal remains unused.
Attention
: High-level
and RCA inputs must
never
be used simultaneously! This may cause damage to the amplifier
11
LINE OUT / OUTPUT
Fullrange RCA output to connect further amplifiers
12
REMOTE socket
To connect the bass remote control
13
BRIDGED socket
To connect an RCA cable for link mode operation
High quality RCA cable is recommended (max. 1.5m / 4.9 ft)
14
BRIDGED mode switch
(MASTER / SLAVE)
To select the operation mode of the amplifier (see also link mode diagram)
15
PHASE CONTROL switch
To select the phase of the connected subwoofer in relation to further speakers (0° / 180°)

4
RCA input wiring
High-level input wiring

5
Link mode mode wiring
Ø min. 4 mm² / 11 AWG

6
Specifications
Model
GZHA MINI ONE-K
Type
Mono Class D
RMS Power @ 4
Ω
CEA Standard CEA-2006-A
340 W (1% THD+N)
RMS Power @ 2 Ω
CEA Standard CEA-2006-A
600 W (1% THD+N)
RMS Power @ 1 Ω
CEA Standard CEA-2006-A
1000 W (1% THD+N)
RMS Power @ 2Ωlink mode
CEA Standard CEA-2006-A
2000 W (1% THD+N)
2300 W (10% THD+N)
Damping factor
> 100
Low pass crossover
30 Hz – 250 Hz (24 dB/Octave)
High pass crossover (subsonic)
10 Hz – 50 Hz (24 dB/Octave)
Band pass crossover
10 Hz – 250 Hz (24 dB/Octave)
Bass boost
0 ~ +12 dB (45 Hz)
Frequency range
10 Hz – 250 Hz
(± 1 dB)
Input sensitivity
300 mV – 6 V
(± 5%)
Bass remote control

Fuse(s)
3 x 35 A
Dimensions (B x H x L)
135 x 52 x 322 mm
5.32 x 2.05 x 12.68”

7
Trouble shooting guide
Symptoms
Check / Cause
Action
No audible
sound
Does the POW LED turn to green?
Check protection fuse(s) of the amplifier
Check remote wire connection (RCA input mode)
Check +12 Volt power supply wire connection
Check ground wire connection
Did the PRO 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 both RCA leads? 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 units volume / wait for cooling
Speaker wires short / speaker damaged Check speaker / wires and insulate if necessary

8
Terms of warranty
The limited warranty for this product is covered by Ground Zero´s local distribution partners and their
terms and conditions. For further information contact your local retailer or distributor.
Ground Zero GmbH
Erlenweg 25, 85658 Egmating, Germany
Tel. [phone] Fax -8310
www.ground-zero-audio.com