Ground Zero Competition Series User manual

COMPETITION SERIES
AMPLIFIER
OWNER’S MANUAL
GZCA 3.0K-SPL
Features
•1 Ohm stable mono fullrange amplifier
•High efficient class D technology
•Status LED monitoring
•Illuminated GZ logo
•Up to 12 dB adjustable bass boost (@ 35 to 55 Hz)
•Adjustable high-pass filter
•Adjustable low-pass filter
•Adjustable input sensitivity
•Thermal / short circuit / overload protection

2
Recommended wiring
GZCA 3.0K-SPL
Speaker wires
min 2.5 mm² / 13 AWG
Power supply wires
min 35.0 mm² / 2 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 the recommended fuses of all connected devices to the power wire)
•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 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)
•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.
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 – GZCA 3.0K-SPL

4
Controls & Features – GZCA 3.0K-SPL
* To avoid any kind of malfunction, it is strongly recommended to use high quality RCA wires!
1
INPUT socket
to connect RCA wire* from the audio source / head unit
2
OUTPUT socket
to connect another amplifier /provides the original audio signal
3
FILTER HP control
to adjust the required high pass crossover point from 5 Hz to 80 Hz
4
FILTER LP control
to adjust the required low pass crossover point from 80 Hz to 20 KHz
5
LEVEL control
to adjust the input sensitivity
6
BASS BOOST control
to adjust the bass boost level from 0 dB to +12 dB
7
BOOST FREQ. control
to adjust the bass boost frequency from 35 Hz to 55 Hz
8
9
OUTPUT terminal
(+) positive speaker wire connection
( - ) negative speaker wire connection
10
11
12
POWER supply terminal
+BAT
-> to the battery connection /+12 V
REM -> to the remote output of the head unit
GND -> to the ground connection
13
14
15
STATUS signs
POWER indication sign
PROTECTION indication sign
CLIPPING indication sign

5
Input and Output wiring – GZCA 3.0K-SPL

6
Signal input wiring – GZCA 3.0K-SPL

7
Specifications
Model
GZCA 3.0K-SPL
Amplifier type
Mono fullrange class D
RMS Power @ 2 Ω
measured @ 14.4 V
1800 W (0.1% THD+N)
RMS Power @ 1 Ω
measured @ 14.4 V
3400 W (0.1% THD+N)
RMS Power @ 1 Ω
measured @ 12.6 V
3000 W (0.1% THD+N)
S/N ratio
84 dB (LPF 15 KHz / nominal power)
THD+N
0.1 % (@ nominal power / 100 Hz / LPF 15 KHz)
Damping factor
>1000 (@100 Hz / nominal power)
Low pass filter
80 Hz ~20 KHz
High pass filter
5 Hz ~80 Hz
Band pass filter
5 Hz ~20 KHz
Bass boost
0 ~ +12 dB (35 Hz ~ 55 Hz)
Frequency response
10 Hz ~20 KHz
(± 1 dB)
Input sensitivity
500 mV ~8 V
Operation voltage
9 V ~16 V
Fuse
160 A (must be installed separately!)
Dimensions
w x h x l (mm)
225 x 68 x 214
Dimensions
w x h x l (inch)
8.85 x 2.67 x 8.43
Weight
2.6 kg / 5.7 lbs
Recommended battery current
min 160 A / ideally 320 A

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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 sign turn to yellow? No?
Probably there is no power supply
Check the power line fuse(s)
Check remote wire connection to the head unit
Check +12 Volt power supply wire connection
Check ground wire connection
Does the sign blink 10 times? Yes?
The battery voltage is too high or too low
The operation voltage must be 9 to 16 V
Does the sign blink 10 times? Yes?
Load at the speaker terminal is below 1 Ohm
Speaker wires may be shorted (short circuit)
Check the wiring and the speakers
Probably no input signal Check the RCA wiring to the head unit
Does the sign light up red? Yes?
Amplifier turned off due to high temperature
Turn off the amplifier until it cools down
Does the sign blink permanently red? Yes?
The amplifier is probably damaged
Device has to be sent to the service department
Device does not turn on
Does the sign turn to yellow? No?
Probably there is no power supply
Check the power line fuse(s)
Check remote wire connection to the head unit
Check +12 Volt power supply wire connection
Check ground wire connection
Does the sign blink permanently red? Yes?
The amplifier is probably damaged
Device has to be sent to the service department
Distorted audio signal
Does the sign turn red? Yes?
The output signal is distorted
Decrease the amplifier gain ( Level ) or
Decrease the volume level of the head unit
Amplifier is working, but… Does the sign blink frequently red? Yes?
The battery voltage is below 9.5 V
Check and load the battery