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IRIDIUM SERIES
IRIDIUM SERIES
Mono Class D Amplifier
GZIA 1.1500D
Owner´s manual
• High-quality class D amplifier
• 1 ohm stable
• Variable low pass filter
• Phase switch
• High-level input with auto-on function
• Adjustable input sensitivity
• Turn-on delay
• Thermal protection
• Short protection
• Overload protection
• Bass level remote control included
(AWV2.0)
Features
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GROUND ZERO GZIA 1.1500D
IRIDIUM SERIES
Model
GZIA 1.1500D
Amplifier type
RMS Power @ 4 Ω CEA Standard CEA-2006-A (@ 1 kHz)
RMS Power @ 2 Ω CEA Standard CEA-2006-A (@ 1 kHz)
RMS Power @ 1 Ω CEA Standard CEA-2006-A (@ 1 kHz)
1300 W (1% THD+N)
Max. Power @ 1 Ω CEA Standard CEA-2006-A (@ 1 kHz)
1500 W (10% THD+N)
Low pass filter
30 Hz – 250 Hz (12 dB/oct)
Frequency response
10 Hz – 250 Hz (± 1 dB)
Total harmonic distortion (THD+N)
Damping factor
Input sensitivity
200 mV – 6 V
Rec. speaker wire
≥ 4 mm² / 12 AWG
Rec. power wire
≥ 35 mm² / 2 AWG
Fuse(s)
3x 40A
Dimensions w x h x l (heatsink / overall)
Dimensions w x h x l (heatsink / overall)
• 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 enough for the required current!
• If necessary, replace a defective fuse by a fuse with identical quality and value
• Never drill holes to the vehicle´s gas tank, 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, enough air supply for
cooling must be provided. Never cover the surface of the amplifier´s heatsink entirely
• The amplifier should
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.
General mounting instructions
NEVER be mounted onto a vibrating part or surface such as a subwoofer
Specifications
Mono class D
425 W (1% THD+N)
775 W (1% THD+N)
192 x 49 x 360/388 mm
7.56 x 1.93 x 14.17/15.27“
< 0.08%
> 100
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GROUND ZERO GZIA 1. 1500D
IRIDIUM SERIES
1
Speaker terminal
2
Power terminal
3
Fuse(s)
4
Phase switch
5
Low pass filter
7
Sensitivity control
Controller to adjust the input sensitivity
8
Line input (RCA)
never
9
High-level input
never
10
Status indication
11
Remote wire socket
12
Bass Boost control
Controls & Features
To connect the speaker wires - min. load 1 ohm
+12V To be connected to the positive terminal of the battery
REM To be connected to the remote output of the head unit*
GND To be connected to the vehicle´s ground
If necessary to replace a defective fuse, its strongly recommended to
use a fuse with the identical value
To set the required phase ( 0° / 180° )
To adjust the required crossover point. Frequencies above the selected
crossover point will be filtered (30 Hz to 250 Hz)
Input sockets to connect RCA wires
Important note: High-level and RCA inputs should
simultaneously! This may cause serious damage to the amplifier
Head units without RCA pre-amplifier output signal, can be connected
using the high-level input to connect the speaker output of the head
unit directly.
If used, the amplifier turns on automatically (auto-on feature)
The remote input of the power supply terminal remains unused
Important note: High-level and RCA inputs should
simultaneously! This may cause serious damage to the amplifier
POWER (green) ok (correct operation)
PROTECT
To connect the wired remote control
To adjust the bass boost level ( 0 to +12 dB @ 45 Hz)
(*not required in high-level mode)
(or directly to the negative terminal of the battery)
be used
be used
(red) error (protection mode)
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GROUND ZERO GZIA 1.1500D
IRIDIUM SERIES
Symptoms
Check / Cause
Action
No audible sound
Check protection fuse(s) of the amplifier (harness)
Did the PROTECT 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)
No sound on one
channel
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
Status LED turned
on red
Temperature protection circuit active
Decrease head unit´s volume / wait for cooling
Speaker wires short / speaker
damaged
Trouble shooting guide
Does the POW LED turn to green?
Input signal on each RCA lead?
Load impedance of each speaker
correct?
Terms of warranty
The limited warranty for this product is covered by GROUND ZERO´s regional distribution partners and their
terms and conditions. For further information contact your local retailer or distributor.
Check remote wire connection (RCA input mode)
Check +12 Volt power supply wire connection
Check ground wire connection
Check remote wire connection to the head unit
Check if each speaker load impedance matches
the technical specifications of the amplifier
Check speaker / wires and insulate if necessary
Safety Instructions: Do not expose the device to extreme temperatures, fire, high humidity or direct contact with liquids. Do not
use the device if it has been damaged or exposed to liquids. Keep the device, packaging and accessories away from children
and pets to prevent accidents and suffocation.
Manufacturer‘s declaration: Herewith Ground Zero GmbH declares that this product complies with the directive 2014/30/EU
(EMC) and further declares that this product is in conformity with the rules of the EU directives (including all applicable
amendments) 2011/65/EU RoHS2 and 2001/95/EC General Product Safety directive. The full text of the Declaration of
Conformity (EU) is available at the following internet address: www.ground-zero-audio.com. Electronic products contain valuable
raw materials and must not be disposed of with normal household waste. At the end of its service life, please bring the device to
your local recycling facility.
Safety instruction / Manufacturer´s declaration
GROUND ZERO products are engineered in Germany
GROUND ZERO – international sponsor
Ground Zero GmbH
Erlenweg 25, 85658 Egmating, Germany
Tel. +49 (0)8095/873 830 Fax -8310
www.ground-zero-audio.com
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