Ground Zero RADIOACTIVE Series User manual

Die Gewährleistung entspricht der gesetzlichen Regelung. Eine Rücksendung kann nur nach vorheriger

Absprache und in der Originalverpackung erfolgen. Bitte unbedingt einen maschinell erstellten

Kaufbeleg und eine Fehlerbeschreibung beilegen. Von der Gewährleistung ausgeschlossen sind Defekte,

die durch Überlastung, unsachgemäße Behandlung oder bei Teilnahme an Wettbewerben entstanden

sind. Wir behalten uns das Recht vor, zukünftig nötige Änderungen oder Verbesserungen an dem

Produkt vorzunehmen ohne den Kunden darüber zu informieren.

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.

De Garantie bepalingen van alle door ground zero geleverde producten is volgens wettelijke

bepalingen geregeld, Een retourzending kan alleen na duidelijke afspraak en in de originele

verpakking plaatsvinden.SVP een aankoopbon en een duidelijke storingsomschrijving bijvoegen.Van

garantie uitgesloten zijn defecten door overbelasting, onkundig gebruik, of door deelname aan

wedstrijden (SPL) ontstaan zijn. Wij behouden ons het recht om de nodige veranderingen of

verbeteringen aan het product door te voeren zonder de klant hierover te informeren.

La garantie est conforme aux droits légaux. Un retour du produit défectueux doit être dans son

emballage d'origine sur présentation du reçu ou de la facture indiquant la description du defaut.La

présente Garantie n'est pas applicable lorsque le produit a été endommagé en raison: Mauvaise

alimentation, Trop de puissance (HP,Subwoofer) Accident, Installation ou Utilisation non conforme aux

normes Technique (Concours SPL etc). Nous nous réservons le droit d'entreprendre à l'avenir

nécessairement des modifications ou des

améliorations au produit sans informer le client.

Ground Zero GmbH

Erlenweg 25, 85658 Egmating, Germany

Tel. +49 (0)8095/873 830 Fax -8310

www.ground-zero-audio.com

RADIOACTIVE-SERIES

AMPLIFIER

OWNER’S MANUAL

GZRA MICRO ONE

Features

•High efficient compact amplifier

•1 Channel class D

•2 Ohm stable

•Variable 12dB Bass boost (45Hz)

•Variable Phase shift 0 - 180°

•Variable Subsonic 15 - 25 Hz

•Variable Lowpass 40 - 400 Hz

•Adjustable input sensitivity

•Soft delayed remote turn on

•Stereo RCA input

•High level input including auto-on

•Bass remote control

•Thermal / Short / Overload protection

Tools and materials you need

•Screwdriver

•Electric drill, 3 mm / 0.12” carbide drill bit

•Mounting screws

•Soldering gun

•Power wire min. 8 mm² / 8AWG

•Ground wire min. 8 mm² / 8AWG

•Speaker wire min. 2 x 2,5 mm² / 13AWG

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 in your car. Your gas tank, brake lines or cables 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

additional capacitor (power cap) min. 1 F to guarantee a stable operation voltage.

Planning your system

Before beginning the installation, consider the following:

a) If you plan to expand your system by adding other components sometime in the future, ensure adequate

space is left, and cooling requirements are met.

b) If your radio is equipped with preamplifier outputs (RCA), it is advisable to use them.

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 and drill 4 holes. Then

mount the amplifier with the mounting screws.

Warning

Chose 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 battery 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

Input level controller

With this controller you can adjust the input sensitivity.

Subsonic controller

This controller allows you to filter low frequencies in a range between

15 and 25 Hz. This function reduces the mechanical Xmax and raises

the capacity of the connected subwoofer.

Low pass controller

Adjust the variable lowpass frequency to the desired frequency

between 40 and 400 Hz using the controller.

Remote volume control

On – If the bass remote controller is connected

Off – If the bass remote controller is not connected

Bass boost controller

For adjusting of the bass boost level in the range from 0 to +12 dB.

Phase shift controller

This controller allows you to fit the subwoofer channel in-phase to

the front system.

Status indication

GREEN – OK

RED – Error

High / Low switch

Switch between high and low level (RCA) input.

Main connector

Pin 1: GND -> Ground connection (Black)

Pin 2: GND -> Ground connection (Black)

Pin 3: REM -> Remote – on (Red thin)

Pin 4: REM Vol (-) -> Bass remote (Orange/White)

Pin 5: Input left -> Positive signal input L (White)

Pin 6: Input right -> Positive signal input L (Grey)

Pin 7: BATT -> Input power supply +12 Volt (Red thick)

Pin 8: GND -> Ground connection (Black)

Pin 9: OUTPUT +> Positive speaker output SUB (Yellow)

Pin 10: OUTPUT -> Negative speaker output SUB (Darkblue)

Pin 11: REM Vol (+) -> Bass remote (Orange)

Pin 12: Input left -> Negative signal input L (White/Black)

Pin 13: Input right -> Negative signal input L (Grey/Black)

Pin 14: BATT -> Input power supply +12 Volt (Red thick)

Amplifier connection

•The GZRA MICRO ONE comes with a power and signal connector cable. For a reliable connection we

strongly recommend to use the delivered spade connections or solder the joints.

•Make sure input connectors are making good contact with input jacks of the amplifier to avoid shortage or

interruption

•Never use any other connector instead of the original Ground Zero connector. In case of a defective

connector cable, please contact the Ground Zero service.

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° F).

Adjusting the audio level

1. 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.

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 to a potential traffic hazard. In the interest of safety,

Consumer Electronics recommends listening at lower volume levels while driving.

RCA (low level) wiring

High level wiring

Specifications

Model

GZRA MICRO ONE

Type

1 Channel Class D

RMS Power @ 4 Ω

CEA Standard CEA-2006-A

1 x 220 W (1% THD+N)

1 x 270 W (10% THD+N)

RMS Power @ 2 Ω

CEA Standard CEA-2006-A

1 x 350 W (1% THD+N)

1 x 400 W (10% THD+N)

Damping factor

> 100

Lowpass

40 Hz – 400 Hz

Subsonic filter

15 Hz – 25 Hz

Bass boost

0 ~ +12 dB (45 Hz)

Frequency response

15 Hz – 400 Hz (± 1 dB)

Input sensitivity

200 mV – 5 V (± 5%)

Bass remote control



Fuse

30A

Min Power and GND Wire

8 mm² / 8 AWG

Dimensions

W x H x L mm

75 x 44 x 190

Dimensions

W x H x L inch

2.95“ x 1.73“ x 7.48“

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 tuner/deck 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

Check the nominal load impedance at the

amplifier is equal to or greater than 2 ohms.

(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

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