Ground Zero IRIDIUM SERIES User manual

IRIDIUM-SERIES
AMPLIFIER
OWNER’S MANUAL
GZIA 1.1450DX-II
Features
•High efficient class D amplifier
•1 Ohm stable mono
•High-level input with Auto-On
•Up to 12 dB adjustable bass boost (@45 Hz)
•Phase shift switch (0°/180°)
•Adjustable input sensitivity
•Bass remote control
•Thermal / short circuit / overload protection

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Recommended wiring
GZIA 1.1450DX-II
Speaker wires
min 2.5 mm² / 13 AWG
Power supply wires
min 25.0 mm² / 3 AWG
High-level input wires
min 1.00 mm² / 18 AWG
Remote wire
min 0.75 mm² / 20 AWG
Mounting instructions
•As a precaution, it is recommended to disconnect the vehicles battery before mounting (also note the vehicles manual!)
•The power supply wire (+12 V) has to be protected within max. 20 cm / 8” by a main fuse holder with matching fuse value
(Main fuse value has to 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 vehicles 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 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
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.

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Controls & Features – GZIA 1.1450DX-II

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Controls & Features GZIA 1.1450DX-II
1
SPEAKER terminal
Speaker connection
2
POWER supply terminal
GND
-> ground terminal
REM -> remote wire / not to be used with high-level input (8)
BATT+
-> +12 Volt wire from battery terminal
3
Status LEDs
POW -> green
-> ok (correct operation)
PROT
-> red -> error / protection
4
INPUT (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
GAIN 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)
7
LOW-PASS (LPF) control
To adjust the required crossover point. Frequencies above the selected crossover point will
be filtered (30 Hz to 250 Hz)
8
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
9
REMOTE socket
To connect the bass remote control
10
PHASE CONTROL switch
To select the phase (0° / 180°) of the connected subwoofer in relation to further speakers
(e.g. front speakers)

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RCA input wiring – GZIA 1.1450DX-II

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Highlevel input wiring – GZIA 1.1450DX-II

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Specifications
Model
GZIA 1.1450DX-II
Amplifier type
Mono class D
RMS Power @ 4
Ω
CEA Standard CEA-2006-A
400 W (1% THD+N)
Max Power @ 4
Ω
500 W (10% THD+N)
RMS Power @ 2 Ω
CEA Standard CEA-2006-A
750 W (1% THD+N)
Max Power @ 2
Ω
850 W (10% THD+N)
RMS Power @ 1
Ω
CEA Standard CEA-2006-A
1250 W (1% THD+N)
Max Power
1450 W (10% THD+N)
Damping factor
> 100
Low pass filter
30 Hz – 250 Hz (12 dB/Oct)
Bass boost
0 ~ +12 dB (45 Hz)
Frequency response
10 Hz – 250 Hz
(± 1 dB)
Input sensitivity
200 mV – 6 V
(± 5%)
Bass remote

Fuse(s)
3x 40A
Dimensions
w x h x l (mm)
192 x 49 x 360
Dimensions
w x h x l (inch)
7.56 x 1.93 x 14.17

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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 +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