Ground Zero HYDROGEN SERIES User manual

HYDROGEN-SERIES
AMPLIFIER
OWNER’S MANUAL
GZHA MINI FOUR 24V
Features
•High-efficient class D mini amplifier
•For 24V use
•Extreme compact size
•2 Ohm stable stereo
•High-level input with Auto-On
•Adjustable wide-range filters
•Adjustable input sensitivity
•Thermal / short circuit / overload protection
Recommended wiring
GZHA MINI FOUR 24V
Speaker wires
min 1.5 mm² / 15 AWG
Power supply wires
min 16.0 mm² / 6 AWG
High-level input wires
min 1.00 mm² / 18 AWG
Remote wire
min 0.75 mm² / 20 AWG

2
Mounting instructions
•As a precaution, it is recommended to disconnect the vehicles battery before mounting (also note the vehicles manual!)
•The power supply wire needs to be protected within max. 20 cm / 8” by a main fuse holder with matching fuse value
(Main fuse value needs be equal to the sum of values of the fuses of each connected device)
•If necessary, replace a defective fuse with the identical value only
•Never drill a hole to the vehicle´s gas tank or brake lines, to wirings or any other important vehicle part!
•Never pass wires over sharp edges or vehicle parts
•Keep the wiring away from the antenna and electronic devices contributing to radio reception
•Lay the power supply wiring always separated from speaker wiring
•The amplifier contains a temperature protection circuit that turns the device off in case of overheating. After a cooling time,
it will turn on again automatically. To avoid heat build-up, sufficient air supply for cooling must be provided. Never cover the
surface of the heatsink entirely.
•The amplifier should not be mounted on a strongly vibrating part or surface (e.g. subwoofer enclosure)
•If a pre-amplified output (RCA) is available ( at the head unit), it is recommended to make use of them
WARNING !
Powerful car audio systems are able to create extremely high SPL similar to real live concert levels. Permanent exposure to excessively high
sound levels may cause damage to or loss of the hearing.
Furthermore, operation of a motor vehicle while listening to audio equipment at high volume levels may impair your ability to concentrate
on road traffic and external sounds such as horns, warning signals or emergency vehicles. In the interest of general and own safety, it is
recommended to listen to music at appropriately low volume levels while driving.

3
Controls & Features – GZHA MINI FOUR 24V

4
Controls & Features GZHA MINI FOUR 24V
1
SPEAKER terminal
Speaker connection
2
POWER supply terminal
GROUND
-> ground terminal
REM -> remote wire (10-32V) / not to be used with high-level input (10)
BATT+
-> +24 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
Cable recommendation: GCZZ X-TP series (available lengths 0.57 / 1.14 / 3.14 / 5.49
m)
IMPORTANT:
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
7
X-OVER mode
(crossover)
To setup the crossover for the required use of the amplifier
FULL – entire frequency range will be reproduced
HPF – only mid/high frequencies are reproduced according the control (8)
BPF* – only low frequencies are reproduced according the control (9)
*: Set to BPF filter, the high-pass filter (subsonic) will be activated simultaneously resulting
in a band-pass filter (10 Hz 4000 Hz)
8
HIGH-PASS (HPF) control
To adjust the required crossover point. Frequencies below the selected crossover point will
be filtered (10 Hz to 500 Hz).
This control will also be activated at BPF (7) mode
9
LOW-PASS (LPF) control
To adjust the required crossover point. Frequencies above the selected crossover point will
be filtered (40 Hz to 4000 Hz)
10
HIGH LEVEL input
Instead of using the RCA input (4), the high-level input can be used. To connect the
speaker output of the head unit directly. If used, the amplifier turns on automatically
(Auto-On)
The REM (remote) input of the power supply terminal remains unused
IMPORTANT:
High-level input and RCA inputs should
never
be used simultaneously; this may cause
serious damage to the amplifier

5
Stereo RCA input & output wiring – GZHA MINI FOUR 24V
HIGH LEVEL input wiring – GZHA MINI FOUR 24V
Head Unit
Batterie
max. 20 cm
Sicherung 40A
+
-
Remote Leitung
(Steuerung für el. Antenne)
Cinch (RCA) Ausgang
20 A

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BRIDGED output wiring – GZHA MINI FOUR 24V

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Specifications
Model
GZHA MINI FOUR 24V
Amplifier type
4 channel class D
RMS Power @ 4
Ω
4 x 80 W (1% THD+N)
RMS Power @ 2
Ω
4 x 130 W (1% THD+N)
RMS Power @ 1
Ω
-
RMS Power @ 4
Ω
Bridged
2 x 260 W
(1% THD+N)
2 x 320 W
(10% THD+N)
Damping factor
> 100
Low pass filter
40 Hz – 4000 Hz (12 dB/Oct)
High pass filter
10 Hz – 500 Hz (12 dB/Oct)
Band pass filter
10 Hz – 4000 Hz (12 dB/Oct)
Frequency response
5 Hz – 38 KHz
(± 1 dB)
Input sensitivity
300 mV – 6 V
(± 5%)
Fuse(s)
1x 20A internal
Dimensions
w x h x l (mm)
135 x 52 x 210
Dimensions
w x h x l (inch)
5.32 x 2.05 x 8.27

8
Trouble shooting guide
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
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 +24 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 unit´s volume / wait for cooling
Speaker wires short / speaker damaged
Check speaker / wires and insulate if necessary

HYDROGEN-SERIES
VERSTÄRKER
ANLEITUNG
GZHA MINI FOUR 24V
Ausstattungsmerkmale
•Hocheffiziente Class D Mini Verstärker
•Für den Einsatz an 24 V Betriebsspannung
•Extrem kompakte Außenmaße
•2 Ohm stabil Stereo
•High-Level Eingänge mit Auto-On
•Breitbandig regelbare Filter
•Regelbare Eingangsempfindlichkeit
•Einschaltverzögerung
•Temperatur / Kurzschluss / Überlast-Schutz
Empfohlener Kabelquerschnitt
GZHA MINI FOUR 24V
Lautsprecherleitungen
min 1.5 mm²
Stromversorgungsleitungen
min 16.0 mm²
High-Level Eingangsleitung
min 1.00 mm²
Remote Leitung
min 0.75 mm²

2
Montagehinweise
•Fahrzeugbatterie vor der Installation abklemmen! (Hinweise in der Betriebsanleitung des KFZ beachten!)
•+24 Volt Stromkabel muss max. 20 cm nach der Batterie abgesichert werden. Identischer Sicherungswert, wie die Summe
aller einzelnen Sicherungen der daran angeschlossenen Geräte
•Defekte Sicherungen ausschließlich durch identische Werte ersetzen
•Keine Löcher in den Tank, die Bremsleitung, Kabel oder andere wichtige Fahrzeugteile bohren!
•Kabel niemals über scharfe Kanten führen
•Signal- und Lautsprecherkabel nicht in der Nähe von Antennen-Elektronik oder Antennenkabel verlegen
•Signal- und Lautsprecherkabel grundsätzlich getrennt von Stromkabeln verlegen
•Die Endstufe verfügt über einen thermische Schutzschaltung, welche bei Überhitzung das Gerät abschaltet; nach der
Abkühlung schaltet sich dieses wieder selbstständig ein. Um einen Wärmestau zu vermeiden, sollte für ausreichende
Luftzufuhr zur Kühlung gesorgt werden. Die Oberfläche des Kühlkörpers darf nicht vollflächig abgedeckt werden
•Gerät nicht auf stark vibrierenden Bauteilen oder Oberflächen montieren (z.B. Subwoofer Gehäuse)
•Wenn das Steuergerät (Radio) mit Vorverstärkerausgängen (Cinch) ausgerüstet ist, wird empfohlen, diese zu nutzen
WARNUNG !
Leistungsstarke Car Audio Systeme können extreme Schallpegel, ähnlich denen eines Live-Konzertes, erzeugen. Dauerhaft sehr lauter Musik
ausgesetzt zu sein, kann zu Hörschäden oder sogar zum Hörverlust führen. Außerdem kann laute Musik beim Autofahren die
Wahrnehmung im Straßenverkehr beeinträchtigen. Im Interesse der allgemeinen und der eigenen Sicherheit wird daher empfohlen, während
des Führens eines Fahrzeuges, Musik mit angemessen niedriger Lautstärke zu hören.