GZTA 5125X - Car stereo Ground Zero - Free user manual and instructions

USER MANUAL GZTA 5125X Ground Zero

Spule/Inductor/Filtre Pass bas/Spot/Lowpass Filter Kondensator/Capacitor/Condensatour/Condensator Highpass Filter

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.

www.ground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this. In advance.

Thank you for selecting a Ground Zero amplifier.

We are providing a helpful hints list which should keep you from experiencing

unnecessary shut down. Have fun with this high quality Titanium product.

Features

• 4 Ohm / 2 Ohm stable Stereo
• Mosfet dual power supply
  Power & Protection indicator
  Variable 12dB bass boost (45Hz)
  Variable high pass filter
  Variable low pass filter
  Variable subsonic filter
  Variable phaseshift 0-180 (GZTA 5125X)
  3 Way fullrange operation (GZTA 5125X)
  Adjustable input sensitivity
• Soft delayed remote turn-on
  Remote control
  Thermal / Short / Overload protection

Tools and materials you need

Screwdriver
Electric drill, 3 mm/0.12' carbide drill bit
- Mounting screws
Power wire min. 16 mm²
Ground wire min. 16 mm
- Speaker wire min. 2 × 1.5 ~mm^2

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 brez 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 an capacitor min. 1 Farred 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 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 expend 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 and connecting (amplifier) to the 2 rear speakers.

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

Choose 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 bottom 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.

Controls and functions - GZTA 5120X

Controls and functions - GZTA 5125X

GZTA 5125X

Controls and functions

1	Speaker terminals	For connection of the speakers
2	Power terminals	GND -> Ground connection REM -> Remotes antenna terminals BATT -> +12 Volt
3	Status indication	GREEN - OK RED - Error
4	Pinch Inputs	Terminal for connection of the RCA wires. To avoid failure, please use high quality RCA wires.
5	Input level control	With this controller you can adjust the input sensitivity.
6	Mode switch	Adjust the crossover for the chosen utilization. LFP - Only recess frequencies (below 40Hz - 4000Hz) (GZTA S120X Channel 5: 40Hz - 250Hz) will be reproduced. FULL - All frequencies will be reproduced. HFP - Only middle and high frequencies (GZTA S125X over 5 Hz - 4000 Hz / GZTA S120X over 40 Hz - 4000 Hz) will be reproduced. GZTA S125X: At LFP adjustment, also the Highpass (Subsonic) is activated. This equals a Bandpass filter of 5 - 4000 Hz
7	Low pass controller	Only frequencies from 40 Hz to 4000 Hz (GZTA S120X Channel 5: 40 Hz - 250 Hz) will be reproduced (depending on the LFP filter controller position). Set the filter switch to LOW ("LFP") position. Adjust the variable LFP frequency to the desired frequency using the controller.
8	High Pass controller (Subsonic)	Set the filter switch to HIGH" position. Adjust the variable HFP crossover frequency to the desired frequency using the controller. All frequency between 5 and 4000 Hz (GZTA S120X: 40 Hz - 4000 Hz) will be reproduced.
9	Filter controller	Decoding on the mode switch position. High- or Lowpassfilter can be adjusted in a range from 40 Hz - 4000 Hz with this controller.
10	Subsonic controller (GZTA S120X Channel 5)	For adjusting the subsonic filter in a range from 10 Hz to 50 Hz.
11	Input mode switch	This switch allows you to choose the number of used pinch inputs. All 6 channels of GZTA S125X can be operated with a 2-channel Cinch cable. You can choose if the "S" channel of GZTA S120X should be operated with Cinch input 5/6 or the summation of input 1/2/3/4.
12	Phase Shift controller	This controller allows you to fit the subwoofer channel of GZTA S120X in-phase to the front system.
14	Remote control Input	For connection of the bass remote control.

Input Mode GZTA 5125X

2: This adjustment allows you to operate all 6 channels using the Cinch-Input Ch 1 and Ch 2. This is recommended for active operation of a 3 way front system. For using this possibility, connect for example the input channel to the output channel in the same way as in Fig. 1.

4: The channels 5 and 6 will be operated using the summarized signal from channel 1/2 and 3/4. This mode is suggestive if channel 5 and 6 are only used as subwoofer channels. For using this possibility, connect for example the front and rear chin output of the Ch 1/2 and Ch 3/4 of the amplifier.

6: This adjustment allows you to operate every channel with an own signal. Using this possibility, every channel can be adjusted by your head unit or processor separately.

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^ )

Adjusting the audio level

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.

Connecting the speaker for trimode operation - notes

TRU 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 voli, non-polar capacitors for a high pass crossover to filter out low frequencies and Air-core or Ferri- or coils with a minimum diameter of 1mm / 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

Stereo wiring-GZTA 5120X

Stereo Anschluss / Wiring / Connexion / Aansluiting

Zuma Line Out des Autoradios / To car stereo line out /Sortie stérisde la volture / Naar line out radio

Lautsprecher Impedanz / Speaker impedance /
Impedance haut parleur / Luidspreker impedantie
2~8 Ohm

Bridged wiring - GZTA 5120X

Trimode operation - GZTA 5120X

Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspreker impedantie 2~8 Ohm

Spule/Inductor/Filtre Pass bas/Spot/Lowpass Filter Kondensator/Capacitor/Condensatour/Condensator Highpass Filter

Stereo wiring - GZTA 5125X

Stereo Anschluss / Wiring / Connexion / Aansluiting

Zum Line Out des Autoradios / To car stereo line out /Sortie stéreo de la voiture / Naar line out radio

Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspeker impedantie 2~8 Ohm

Bridged wiring - GZTA 5125X

Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspreker impedantie 4~8 Ohm

Trimode operation - GZTA 5125X

Trimode Anschluss / Wiring / Connexion / Aansluiting
Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspreker impedantie 4 8 Ohm

Specifications

Model GZTA 5120X GZTA 5125X
Type	5 Channel Class A/B 6 Channel Class A/B
RMS Power @ 4ΩCEA Standard CEA-2006-A	4 x 50 W & 1 x 180 W (1% THD+N)	4 x 60 W & 2 x 120 W (1% THD+)
RMS Power @ 2ΩCEA Standard CEA-2006-A	4 x 70 W & 1 x 250 W (1% THD+N)	4 x 80 W & 2 x 180 W (1% THD+)
RMS Power @ 4Ω BridgedCEA Standard CEA-2006-A(1% THD+N)	2 x 130 W (Channel 1-4)	2 x 160 W (Channel 1-4)& 1 x 360 W (Channel 5-6)
RMS Power @ 4Ω BridgedCEA Standard CEA-2006-A(100% THD+N)	2 x 170 W (Channel 1-4)	2 x 190 W (Channel 1-4)& 1 x 420 W (Channel 5-6)
Damping factor	>100
Signal to noise Ratio	>75 dB
Lowpass	40 Hz - 4000 Hz (Channel 1-4)& 40 - 250 Hz (Channel 5)	40 Hz - 4000 Hz
Highpass	40 Hz - 4000 Hz (Channel 1-4) 5 Hz	-4000 Hz
Subsonic filter	10 Hz - 50 Hz (Channel 5) 5 Hz	4000 Hz
Bandpass filter	10 Hz - 250 Hz (Channel 5) 5 Hz	-4000 Hz
Phaseshift	-0" - 180" (Channel 5-6)
Frequency response	5 Hz - 38 KHz(±1 GB)
Input sensitivity	200 mV - 9 V(±5%)
THD	< 0,1 % < 0,1 %
Bass remote control	✓✓
Fuse	2 x 35A 2 x 40A
DimensionsW x H x L mm	412 x 49 x 230 4/2 x 49 x 230
DimensionsW x H x L inch	16.22" x 1.93" x 9.06" 18.56" x 1.93" x 9.06"

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 signal leads. Check again control. Check timer/cock volume level.
	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

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.

www.ground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.

Spule/Inductor/Filtre Pass bas/Spot/Lowpass Filter Kondensator/Capacitor/Condensatour/Condensator Highpass Filter

Connexion Stereo - GZTA 5125X

Stereo Anschluss / Wiring / Connexion / Aansluiting

Zum Line Out des Autoradios / To car stereo line out /Sortie stéreo de la voiture / Naar line out radio

Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspeker impedantie 2~8 Ohm

Bridger-GZTA 5125X

Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspreker impedantie 4~8 Ohm

Connexion Trimode - GZTA 5125X

Trimode Anschluss / Wiring / Connexion / Aansluiting
Lautsprecher Impedanz / Speaker impedance / Impedance haut parleur / Luidspreker impedantie 4 8 Ohm

Spule / Inductor / Filtrate Pass bas / Spoel Lowpass Filter

Kondensator / Capacitor / Condensatour / Condenser Highpass Filter

Données Techniques

Model GZTA 5120X GZTA 5125X
Type	5 Canal Class A/B & 6 Canal Class A/B
Puisance RMS @ 4 ΩCEA Standard CEA-2006-A	4 x 50 W & 1 x 180 W (1% THD-N)	4 x 80 W & 2 x 120 W (1% THD+)
Puisance RMS @ 2 ΩCEA Standard CEA-2006-A	4 x 70 W & 1 x 250 W (1% THD-N)	4 x 80 W & 2 x 180 W (1% THD+)
Puisance RMS @ 4ΩBridgerCEA Standard CEA-2006-A(1% THD-N)	2 x 130 W (Canal 1 - 7)	2 x 160 W (Canal 1 - 4)& 1 x 360 W (Canal 5 - 6)
Puisance RMS @ 4ΩBridgerCEA Standard CEA-2006-A(10% THD+N)	2 x 170 W (Canal 1 - 4)	2 x 190 W (Canal 1 - 4)& 1 x 420 W (Canal 5 - 6)
Damping facteur	> 100
Signal to noise Ratio	> 75 dB
Filtre passage bas	40 Hz - 4000 Hz (Canal 1 - 4)& 40 - 250 Hz (Canal 5)	40 Hz - 4000 Hz
Filtre passage haut	40 Hz - 4000 Hz (Canal 1 - 4) 5 Hz - 4000 Hz
Filtre subsonic	10 Hz - 50 Hz (Canal 5) 5 Hz - 4000 Hz
Filtre bandpass	10 Hz - 250 Hz (Canal 5) 5 Hz - 4000 Hz
Phaseshift	- 0° - 160° (Canal 5 - 6)
Courbe de fréquence	5 Hz - 38 KHz(± 1 dB)
Sensibilité d'entrée	200 mV - 9 V(± 5%)
THD	< 0,1 % < 0,1 %
Bass télécommande	✓ ✓
Fusible	2 x 35A 2 x 40A
Dimensionlaugeur x hauteur x longueur mm	412 x 49 x 230 472 x 49 x 230
Dimensionlaugeur x hauteur x longueur inch	16.22" x 1.93" x 9.00" 18.58" x 1.93" x 9.00"

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.

wwwground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.

Spule/Inductor/Filtre Pass bas/Spot/Lowpass Filter Kondensator/Capacitor/Condensatour/Condensator Highpass Filter

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.

Spule/Inductor/Filtre Pass bas/Spot/Lowpass Filter Kondensator/Capacitor/Condensatour/Condensator Highpass Filter

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.

www.ground-zero-audio.com

We reserve the right to make needed change or improvement to the product without informing customer about this in advance.