Ground Zero HYDROGEN GZHA 2400XII User manual

HYDROGEN-SERIES
AMPLIFIER
OWNER’S MANUAL
GZHA 2400XII
Features
•1 Ohm stable Stereo
•2 Ohm bridgeable
•Mosfet power supply
•SMD Technology
•Power & Protection indicator
•Variable 12dB bass boost (30 – 80 Hz)
•Phaseshift variable 0 - 180°
•Variable highpass / subsonic
•Variable lowpass
•Adjustable input sensitivity
•Soft delayed remote turn- on
•Bass remote control
•Thermal / Short / Overload protection

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Tools and materials you need
•Screwdriver
•Electric drill, 3 mm / 0.12” carbide drill bit
•Mounting screws
•Power wire min. 25 mm² / 4AWG
•Ground wire min. 25 mm² / 4AWG
•Speaker wire min. 2 x 2,5 mm² / 13AWG
Please note!
•As a precaution it is advisable to disconnect the vehicle’s battery before making connection
to the +12 Volts supply wiring (see owner’s manual of your car for further information).
•Please use great caution drilling your trunk. Your gas tank and brake lines can be damaged by puncturing with your drill bit –
this could cause damage or failure of your cars operating systems.
•Never pass wires over sharp angles. It is recommended to buffer the power supply of the amplifier with a capacitor min. 1
Farad to guarantee a stable operation voltage.
WARNING !
High powered audio systems in a vehicle are capable of generating "Live Concert" levels of sound pressure. Continued exposure to
excessively high volume sound levels may cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio
equipment at high volume levels may impair your ability to hear
external sounds such as; horns, warning signals, or emergency vehicles, thus constituting to a potential traffic hazard. In the interest of
safety, Consumer Electronics recommends listening at lower volume levels while driving.
Planning your system
Before beginning the installation, consider the following:
a. If you plan to expand your system by adding other components sometime in the future, ensure adequate space is left, and
cooling requirements are met.
b. If your radio / source is equipped with pre-amp outputs, it is possible to utilize them to drive the amplifier
Mounting your amplifier
a. Select a suitable location that is convenient for mounting, is accessible for wiring
and has ample room for air circulation and cooling.
b. Use the amplifier as a template to mark the mounting holes, remove the amplifier.
Warning
Chose a mounting position where all electric wires are protected from being damaged by sharp edges, heat or other conditions. +12Volt
DC electrical connections must be fused on the battery side. Make sure your radio and all other devices will be turned off while connection
your system. If you need to replace the power fuse, replace it only with a fuse identical to that supplied with the system. Using a fuse of
different type or rating may result in damage to this system which isn’t covered by the warranty.

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Controls and functions

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Controls and functions
1
Speaker terminals
For connection of the speakers
2
Power terminals
GND -> Ground connection
REM -> Remote antenna terminal
BATT -> +12 Volt
3
Status indication
WHITE – OK
RED – Error
4
RCA inputs
Terminal for connection of the RCA wires.
To avoid failure, please use high quality RCA wires.
5
Input level controller
With this controller you can adjust the input sensitivity.
6
Bass boost controller
For adjusting of the bass boost level in the range from 0 to +12 dB.
7
Bass boost frequency
For adjusting the bass boost frequency between 30 and 80 Hz.
8
High pass controller
(Subsonic)
Set the filter switch to „HIGH“ position.
Adjust the variable HPF crossover frequency between 5 and 500 Hz.
9
Mode switch
Adjust the crossover for the chosen utilization.
LPF – Only bass frequencies (below 30Hz - 250Hz) will be reproduced.
At LPF adjustment, also the highpass (Subsonic) is activated.
This equals a bandpass filter of 5 – 250 Hz.
FULL – All frequencies will be reproduced.
HPF – Only frequencies above 5 – 500Hz will be reproduced.
10
Low pass controller
Only frequencies below 30 - 250 Hz will be reproduced (depending on the
LPF filter controller position). Set the filter switch to „LOW“ position. Adjust
the variable LPF frequency to the desired frequency using the controller.
At LPF adjustment, also the highpass (Subsonic) is activated.
This equals a bandpass filter of 5 – 250 Hz.
11
Phase shift controller
This controller allows you to fit the subwoofer channel in-phase to the front
system.
12
Remote control input
For connection of the bass remote control.
Turning on the amplifier
The amplifier automatically turns on a few seconds after you turn on your radio.
Note: Your amplifier temporarily shuts down if it gets too hot, then restarts automatically once it cools
(At about 80° / 176° F).
Adjusting the audio level
1. LEVEL (Min/Max): Turn fully counter- clockwise to MIN position
2. Turn the auto sound system's volume control to about two-third of its full range.
3. Adjust LEVEL to a comfortable listening level.

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Stereo wiring
Mono wiring

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Trimode wiring
Trimode crossover
TRI MODE operation output allows a subwoofer to be operated in mono mode while the main speakers are playing in stereo. Leave the
crossover switch on “Full” position.
Use 100 volt, non-polar capacitors for a high pass crossover to filter out low frequencies and Air- core or
Ferrit-core coils with a minimum diameter of 1 mm / 0.039” for the lowpass crossover to filter out high frequencies.
The capacitor and inductor values as written in the below table. The front and rear channels of this amplifier get this capability. Only the
rear left and right channels are shown on the following pictures.
Values for 6dB passive crossover
Frequency
Inductor
Capacitor
80 Hz
7,5 mH
470 uF
100 Hz
6,5 mH
330 uF
120 Hz
5,5 mH
370 uF
150 Hz
4 mH
220 uF

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Specifications
Model
GZHA 2400XII
Type
2 Kanal Class AB
RMS Power @ 4 Ω
CEA Standard CEA-2006-A
2 x 270 W (1% THD+N)
RMS Power @ 2 Ω
CEA Standard CEA-2006-A
2 x 480 W (1% THD+N)
RMS Power @ 1
Ω
CEA Standard CEA-2006-A
2 x 750 W (1% THD+N)
2 x 900 W (10% THD+N)
RMS Power @ 4
Ω
Bridged
CEA Standard CEA-2006-A
1 x 960W (1% THD+N)
RMS Power @ 2ΩBridged
CEA Standard CEA-2006-A
1 x 1500 W (1% THD+N)
1 x 1800 W (10% THD+N)
Damping factor
> 200
Lowpass
30 Hz – 250 Hz
Highpass
5 Hz – 500 Hz
Bandpass
5 Hz – 250 Hz
Bass boost
0 ~ +12 dB (30 – 80 Hz variable)
Phase shift
0 – 180° (variable)
Frequency response
5 Hz – 38 kHz (± 1 dB)
Input sensitivity
200 mV – 9 V (± 5%)
Bass remote control

Fuse
4 x 40A
Dimensions
W x H x L mm
293 x 67 x 400
Dimensions
W x H x L inch
11.54“ x 2.64“ x 15.75“
Trouble shooting guide
Symptoms
Check Points
Cure
No sound Is the POWER LED illuminated?
Check fuses in amplifier.
Be sure remote lead is connected.
Check +12 Volt connection
Check ground connection
Is the diagnostic LED illuminated?
Check for speaker short or amplifier overheating
Amp not switching on
No power to the amplifier
Check power wire or connections
No power to remote wire with receiver on
Check connections to radio
No sound in one channel
Check speaker leads
Inspect for short circuit or an open connection
Check audio leads
Reverse left and right RCA inputs to determine if it
is occurring before the amp
Amp turning off at medium /
high volume Check speaker load impedance
Be sure proper speaker load impedance
recommendations are observed
(If you use an ohm meter to check speaker
resistance, please remember that DC resistance
and AC impedance may not be the same.)
Protection LED is on
Temperature shut down
Turn radio volume down
Speaker wires short
Separate speaker wires and insulate

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Die Gewährleistung entspricht der gesetzlichen Regelung. Eine Rücksendung kann nur nach vorheriger Absprache und in der
Originalverpackung erfolgen. Bitte unbedingt einen maschinell erstellten Kaufbeleg und eine Fehlerbeschreibung beilegen. Von der
Gewährleistung ausgeschlossen sind Defekte, die durch Überlastung, unsachgemäße Behandlung oder bei Teilnahme an Wettbewerben
entstanden sind. Wir behalten uns das Recht vor, zukünftig nötige Änderungen oder Verbesserungen an dem Produkt vorzunehmen ohne
den Kunden darüber zu informieren.
Limited warranty - defective products must be returned in original packaging - please add a copy of the original purchasing invoice showing
the purchasing date and a detailed description of the failure. Failure caused by overload, misuse or by using the product for competition
purpose are not covered by the warranty. We reserve the right to make needed change or improvement to the product without informing
customer about this in advance.
De Garantie bepalingen van alle door ground zero geleverde producten is volgens wettelijke
bepalingen geregeld, Een retourzending kan alleen na duidelijke afspraak en in de originele
verpakking plaatsvinden.SVP een aankoopbon en een duidelijke storingsomschrijving bijvoegen.Van garantie uitgesloten zijn defecten door
overbelasting, onkundig gebruik, of door deelname aan wedstrijden (SPL) ontstaan zijn. Wij behouden ons het recht om de nodige
veranderingen of verbeteringen aan het product door te voeren zonder de klant hierover te informeren.
La garantie est conforme aux droits légaux. Un retour du produit défectueux doit être dans son
emballage d'origine sur présentation du reçu ou de la facture indiquant la description du defaut.La présente Garantie n'est pas applicable
lorsque le produit a été endommagé en raison: Mauvaise alimentation, Trop de puissance (HP,Subwoofer) Accident, Installation ou
Utilisation non conforme aux normes Technique (Concours SPL etc). Nous nous réservons le droit d'entreprendre à l'avenir nécessairement
des modifications ou des
améliorations au produit sans informer le client.
Ground Zero GmbH
Erlenweg 25, 85658 Egmating, Germany
Tel. [phone] Fax -8310
www.ground-zero-audio.com