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HYDROGEN-SERIES
AMPLIFIER
OWNER’S MANUAL
GZHA MINI ONE
GZHA MINI TWO
GZHA MINI FOUR
Features
• High efficient class D mini amplifier
• Extreme compact size
• 2 Ohm stable stereo (MINI TWO / FOUR)
• 1 Ohm stable mono / 2 Ohm linkable (MINI ONE)
• High-level input with Auto-On
• 12 dB adjustable bass boost (@45 Hz) (MINI ONE)
• Adjustable wide-range filters
• Adjustable input sensitivity
• Bass remote control (MINI ONE & MINI TWO)
• Thermal / short circuit / overload protection
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GZHA MINI ONE
GZHA MINI TWO
GZHA MINI FOUR
Speaker wires
min 2.5 mm ² / 13 AWG
min 2.5 mm ² / 13 AWG
min 1.5 mm ² / 15 AWG
Power supply wires
min 20.0 mm ² / 4 AWG
min 16.0 mm ² / 6 AWG
min 16.0 mm ² / 6 AWG
High-level input wires
min 1.00 mm ² / 18 AWG
Remote wire
min 0.75 mm ² / 20 AWG
WARNIN G !
Mounting instructions
Recommended wiring
• As a precaution, it is recommended to d isconnect the vehicl es battery before mounting (also note the vehicles manua l!)
• The power s upply wire (+12 V) has to be pr otected within max. 20 cm / 8” by a ma in fuse holder with matching fuse value
(Main fuse va lue has to be equa l to the s um of va lues of th e fuses of each co nnect ed devi ce)
• If necess ary, replace a defective fuse with the identical value only
• Never drill a hole to th e vehicles gas tank or b rake li nes, to wirings or any other im portant 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 overh eating. After a cooling time,
it will turn on again automatically. To avoid heat buildup, 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
Powerful car audio systems are able to create extr emely high SPL s imil ar to real live concert level s. Permanent exposure to excess ively 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 m usic at appropriately low volume lev els while driving.
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Controls & Features – GZHA MINI ONE
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Controls & Features – GZHA MINI TWO
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Controls & Features – GZHA MINI FOUR
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1
SPEAKER terminal
Speaker conn ection
2
POWER supply terminal
GROUND
-> ground terminal
BATT+ -> +12 Volt wire from battery termin al
3
Status LEDs
POW -> green -> ok (correct operation)
4
LINE-IN (RCA input)
Input sockets to connect RCA wires - to avoid any malfunction, it is recommended to use
never
damage to the amplifier.
5
LEVEL control
Controller to adjust the input sensitivity
6
BASS BO OST control
7
X-OVER mode
(crossover)
To setup the cros sover fo r the required use of the amplifier
a band-pass filter (10 Hz 4000 Hz )
8
HIGH-PA SS (HPF) control
SUBSONIC
To adjus t the required crossover point. Frequencies below the select ed crossover point will be
This control will also be activated at BPF (7) mode (MINI TWO & MINI F OUR)
9
LOW-PA SS (LPF) control
To adjust the required cros sover point. Frequencies ab ove the selected cro ssover point will
be filtered (40 Hz to 4000 Hz / MINI ONE: 30 Hz to 250 Hz)
10
HIGH LEVEL input
Instead of usi ng the RCA input (4), the high-lev el input can be used. To con nect th e speaker
never
serious damage to the amplifier
11
LINE OUT / OUTP UT
(MINI ONE & MINI TWO)
12
REMOTE socket
(MINI ONE & MINI TWO)
13
BRIDGED s ocket
To connect an RCA cable for link mode operation
High quali ty RCA cable (max. 1.5m / 4.9 f t ) is r ecommend ed
14
BRIDGED m ode switch
(MASTER / SLAVE)
15
PHASE CONTRO L switch
To select the phase (0° / 18 0°) of the conne cted sub woofer in rela tion to fur ther s peakers
(e.g. front speaker s)
Controls & Features GZHA MINI amplifier series
REM -> remo te wire / not to be us ed with high-level input (10)
PRO -> red -> error / protection
only high quality RCA cables
Cable recommendation: GCZZ X-TP series (available lengths 0.57 / 1.14 / 3.14 / 5.49 m)
IMPORTA NT:
High-level and RCA inputs should
be used s imultaneously! This may cause serious
(MINI ONE)
(MINI TWO & MINI FOUR)
(MINI TWO & MINI FOUR)
(MINI ONE)
(MINI ONE)
(MINI ONE)
(MINI ONE)
Controller to a djust the bass bo ost level ( 0 to +12 d B at 45 Hz)
FULL – entire frequency rang e will b e reprod uced
HPF – only mid/high frequencies are reproduced according the control (8)
BPF* – only low frequencies are rep roduced accord ing the control (9)
*: Set to BPF filter, the high-pass filter (subsonic) will be activated simultaneously resulting in
filtered (10 Hz to 500 Hz / MINI ONE: 10 Hz to 50 Hz).
output of the head unit directly. I f used, the am plifier turns on automatically (Auto-On)
The REM (remote) input of the power supp ly termi nal rem ains unused
IMPORTA NT:
High-level input and RCA inputs should
be used simultaneously; this may cause
Fullrange RCA output to connect further amplifiers
To connect the bass remote control
To select the opera tion mode of th e ampl ifier (see also LINK MODE diagram)
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head unit
further amplifier(s)
battery
max. 20cm/
fuse 60A
+
-
remote wir e (+12 V)
RCA output
OEM head unit
speaker output
RCA input wiring – GZHA MINI ONE
HIGH LEVEL input wiring – GZHA MINI ONE
0.66ft
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SLAVE
MASTER
BRIDGED (LINK MODE) mode wiring – GZHA MINI ONE
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length max. 1.5 m / 4.9 ft
Ø min. 4 mm² / 11 AWG
MASTER
SLAVE
BRIDGED (LINK MODE) output wiring – GZHA MINI ONE
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head unit
further amplifier(s)
battery
max. 20 cm/
0.66 ft
fuse 3 0A
+
-
remote wire (+12 V )
RCA output
OEM head unit
speaker output
HIGH LEVEL input wiring – GZHA MINI TWO
Stereo RCA input & output wiring – GZHA MINI TWO
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BRIDGED output wiring – GZHA MINI TWO
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head unit
battery
max. 20 cm/
0.66 ft
fuse 40A
+
-
remote wire (+12 V)
RCA output
OEM head unit
speaker output
HIGH LEVEL input wiring – GZHA MINI FOUR
Stereo RCA input & output wiring – GZHA MINI FOUR
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BRIDGED output wiring – GZHA MINI FOUR
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Specifications
Model
GZHA MINI ONE
GZHA MINI TWO
GZHA MINI FOUR
Amplifier type
RMS Power @ 4 Ω
CEA Standar d CEA-2006-A
RMS Power @ 2 Ω
CEA Standar d CEA-2006-A
RMS Power @ 1 Ω
CEA Standar d CEA-2006-A
RMS Power @ 4 Ω Gebrückt
CEA Standar d CEA-2006-A
1 x 460 W
2 x 260 W
RMS Power @ 2 Ω Linkmode
CEA Standar d CEA-2006-A
Damping factor
Low pass filter
High pass filter
Band pass filter
Bass boost
Frequency response
10 Hz – 250 Hz
5 Hz – 38 KHz
Input sensitivity
Bass remote
Fuse(s)
Dimensions
w x h x l (mm)
Dimensions
w x h x l (inch)
Mono class D 2 channel cl ass D 4 channel cl ass D
220 W (1% THD+N) 2 x 130 W (1% THD+N) 4 x 80 W (1% THD+N)
390 W (1% THD+N) 2 x 230 W (1% THD+N) 4 x 130 W (1% THD+N)
630 W (1% THD+N)
-
1260 W (1% THD+N)
1500 W (10% THD+N)
30 Hz – 250 Hz (24 dB/Oct) 40 Hz – 4000 Hz (12 d B/Oct)
10 Hz – 50 Hz (24 dB/Oct) 10 Hz – 500 Hz (12 dB/Oct)
10 Hz – 250 Hz (24 dB/Oct) 10 Hz – 4000 Hz (12 dB/Oct)
0 ~ +12 dB ( 45 Hz)
(1% THD+N)
1 x 550 W (10% THD +N)
> 100
-
2 x 320 W ( 10% THD+N)
-
-
(1% THD+N)
(± 1 dB)
300 mV – 6 V
(± 5%)
(± 1 dB)
-
2x 30A 1x 30A 1x 40A internal
135 x 52 x 210
5.32 x 2.05 x 8.27
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Erlenweg 25, 85658 Egmating, Germany
Tel. +49 (0)8095/873 830 Fax -8310
www.ground-zero-audio.com
Symptoms
Check / Cause
Action
Check prote ction fus e(s) of the amplifier
Did the P RO LED turned to red?
Check for speaker short or amplifier overheating
Power supply of the amplifier?
Check power wire or connections
Remote wire powered? (RCA input mode)
Check remote wire connection to the head unit
Speaker wiring undamaged?
Check for short circuit or open connections
Reverse left and right RCA inputs to check the
audio input signal
Device turns off at medium /
high volume
Check if each speaker load impedance matches
the technical specifications of the amplifier
Temperature protection circuit a ctive
Decreas e head un its volume / wait for cooling
Speaker wires short / speaker damaged
Check spea ker / wi res and insulate if neces sary
Trouble shooting guide
No audible sound
Device does not turn on
No sound on one channel
Status LE D turned on red
The limited warranty for this product is covered by Ground Zero´s local distribution partners and their
Does the POW LED turn to gr een?
Input signal on both RCA leads?
Load impedance of each speaker correct?
Terms of warranty
terms and conditions. For further information contact your local retailer or distributor.
Check remote wire connection (RCA i nput mode)
Check +12 Volt power supply wire connection
Check ground wire connection
Ground Zero GmbH
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