Ground Zero GZDSP 6-8X Service Manual

Download

DIGITAL SOUND

PROCESSOR

MANUAL

GZDSP 6-8X

Features

• Digital sound processor

• Simple handling via 1-page user interface

• Realtime setup (all functions)

• Cirrus Logic single core 32 Bit, 8-channel, 192 kHz

• 6 channel input / 8 channel output

• High-level and low-level input

• DC Auto-On (using the high-level input)

• TOSLINK input (optical @12 ~ 96 kHz )

• 3.5mm stereo jack AUX – input connector

• 6 x 31 band equalizer ( -18 to + 12 dB / Q: 0.5 - 9 ) 20 - 20000 Hz (on output A - F)

• 2 x 11 band equalizer ( -18 to + 12 dB / Q: 0.5 - 9 ) 20 - 200 Hz (on output G/H)

• Time alignment – adjustable range 0 - 15 ms / 0 - 510 cm

• Adjustable filters (Butterworth) HPF / LPF / BPF with a slope of 6 – 48 dB/Oct.

• selectable phase shift for each channel (0˚ or 180°)

• Memory for up to 10 user presets

• Optional remote control unit with LED display to adjust the main volume and

switch between the presets and input mode

- 2 -

Package contents

GZDSP Remote

• 1 x GZDSP 6-8X processor

• 1 x USB cable ( A- to Mini-B connector) 5 m

• 1 x high-level input harness

• 1 x power supply harness

• 1 x PC software und drivers on CD-ROM

• 1 x manual (German/English)

optional:

• remote control unit

with LED display incl. connection wire

Table of contents

Important safety notes and installation instructions 3

Audio connection 4

Power supply connection 5

Remote out connector usage 6

High-level input connection 6

Remote control unit usage 7

PC software installation 7

DSP to PC connection 8

USB port selection 9

Wrong COM port error 10

Software user interface features 11 - 17

>FILE< dropdown menu 18

Preset memory saving 18

Digital sound processor (application examples) 19

Technical specifications 20

Troubleshooting 21

Warranty conditions 22

- 3 -

WARNING!

• screwdriver

• electric drill, 3 mm / 0.12“ carbide drill bit

• mounting screws

• power wire min. 1 mm² / 17 AWG

• ground wire min 1 mm² / 17 AWG

Most important

• Disconnect vehicle battery befor e starting the installation! (Note the vehicle’s operating manual)

• Never drill any holes into the fuel tank, brake pipes, wiring or any other sensitive parts of the vehicle!

• Keep the installed wires away from any sharp edges!

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! This ma y lead to potential traffic hazards. In the interest of safety, consumer electronics recommends listening at lower volume levels while driving.

Required parts and tools for the installation

Before starting to install the unit, plea se consider the following:

a. If you are planning to expand your system by adding other components in the future, ensure enoug h space is left and cooling requirements are met.

b. If your head-unit is equipped with pre-amplified outputs (RCA), we recommend to use them.

Mounting the Unit

Planning your system

a) Select a suitable location that is convenient for mounting, is accessible for wiring

and has enough space for air circulation and cooling.

b) You may use the unit as a template to mark the mounting holes, then r emove it and drill the ma rked holes .

Finally mount the unit with the mounting screws.

Caution

Choose a mounting position where all electric wires are protected from damage by sharp edges, heat or other conditions. +12 Volt DC electrical connections must be fused on the battery side. Make sure your head-unit and all other devices will remain turned off while connecting parts of the system. If it is necessary to replace any fuse make sure to use only an equivalent one. Using inferior fuses may cause serious damage to your unit, system or even your cars wiring. Any kind of damage traced back on disregard of these notes will not be covered b y the warranty!

- 4 -

Status LED

LED lights up - unit is ready and working

RCA output

Every single RCA (LINE OUT) connector provides an audio-signal driving the RCA inputs of the amplifier and is capable of being configured using the DSP PC software.

USB port

Connect th e unit with the supplied cable to your PC to operate the user int erfac e and configure the

Optical input (TOSLINK)

Audio sources offering an optical SP/DIF signal (Stereo PCM) may be connected to this port using a

Please note: optional remote control unit (GZDSP Remote)

RC connector

Connector for the optional remote control unit GZDSP Remote

Subwoofer input

If your head-unit has six pre-amplified output channels, the (two) subwoofer channels should be

High-level input

The High-Level Input has to be used if the h ead-unit has neither pre-amplified output, nor offering

Caution:

cannot

malfunction and cause serious damage to the DSP unit.

RCA input

Connect the pre-amplified head-unit output for front and rear signals using suitable wires to the RCA (LINE IN) sockets.

AUX Input Please note:

GZDSP Remote)

Audio Connection

setup of the DSP. Ma ke sure to install the PC software previously. The unit may be disconnected after the setup is done. We do not recommend to use any extension cord with the supplied USB wire, as the proper function ca not be ensured. If the enclosed wire is too short, we recommend a suitable USB wire with an integrated repea ter. The LED next to the USB port will light up blue as soon as the DSP unit has been connected to the PC.

suitable TOSLINK wire.

connected to these inputs.

a SP/DIF signal. In this case the head-unit speaker output wires have to be connected to the Highlevel Input harness. By using the High-Level Input the DSP unit will turn on automatically recognizing the DC level, therefore it is not necessary to connect the Remote-In wire to the power terminal.

External audio sources like smartphone, MP3-player or mobile GPS s ystem may be connected to the 3.5 mm (1/8”) stereo jack and used with the auxiliary input mode.

optional remote control unit (

If the audio source offers no variable volume level, it is absolutely neces sary to use th e

The high-level input and the RCA input

If the audio source offers no variable volume level, it is absolutely neces sary to use th e

be used a t the same time. This may lead to

- 5 -

Ground

Connect th e unit to a suitable ground terminal on the vehicles body. The ground wire should be as

+ 12 Volt Power

Connect th e unit to the + 12 volt power pole o f the vehicles battery. Use an adequate power wire

Remote In

+12 Volt remote turn on signal. Connect the head-units remote out wire (REM) for amplifiers or the

Please note:

Remote Out

To be used with additional system equipment like amplifiers. If connected to the amplifiers Remote-In

130 mA!

Power Supply Connection

short as possible and be mounted to an unvarnished metal part of the vehi cles body. Ensure that this part has an unlimited electrical connection to ground pole of the battery. Use an adequate ground wire gauge (not less than 1,0 mm² / 17 AWG). The ground wire gauge should match the power wire gauge.

gauge (not less than 1,0 mm² / 17 AWG) and mount an additional fuse holder (with a 2 Ampere fuse) which will not be further than 30 cm / 12” away from the power p ole of th e vehicles ba ttery. The fuses should not be plugged into the fuse holder before the installation has been finished.

electric antenna if the RCA signal input or the optical connector is used. A wire gauge of 0.5 mm² / 20 AWG is sufficient.

By using the high-level input the DSP unit will be turned on automatically if a DC-On voltage is recognized. Therefore it is not necessary to connect a remote wire to the power terminal. This feature will work fine with most of the modern head-units. However some older head-units may not be capable to provide the DC-On signal. In this case the Auto Turn/On feature cannot be used. The Remote-Out function remains in Auto Turn/On mode and may be used for additional system equipment.

Auto Turn/On (activates the DSP unit)

terminal the amplifier will turn on or off together with the DSP unit when the head-unit is turned on or off. A wire gauge of 0.5 mm² / 20 AWG is sufficient to connect the amplifier. The current should not exceed additional relay (page 6).

If the current of multiple connected units is higher, it is necessary to use an

- 6 -

Relay circuit for using multiple amplifiers at the REMOTE OUT teminal

Relais ist nicht im Lieferumfang enthalten / Relay is not included in the package content

High-Level Connector Pin Assignment

- 7 -

Input Set

Selects the Input Mode in shown sequence (MAIN/AUX-IN/OPTICAL)

Level Controller

The controller sets the main volume level of the DSP unit. Subwoofer level (SUB OUT G/H) can be adjusted after pushing and holding the button for approximately 3 seconds.

LED Display

The LED display will show the current volume level or the chosen preset

Mode (Presets)

Up/Down button switch between previously saved presets. The OK button confirms the selection and sets the DSP to this preset.

Important note for 64 bit operating systems:

Software update:

1 2 3

Installation of PC software

In order to install and use the PC software, a Windows™ XP (SP3) operating system (or later) and a USB port is required. The installation will need about 25 MB free memory space. We recommend to use a laptop for easier handling. Insert the enclosed CD-ROM into the CD drive of your PC. If there is no CD drive available, the software can be downloaded from the following link: http://ground-zero-audio.com/de/downloads/dsp-software.html Run the setup.exe, the installation wizard will install the software for the DSP the usual way. We recommend to create a desktop icon. The drivers will be installed automatically during the DSP software installation. Restart the PC after the installation has been finished.

It may be necessary to install a 64 bit driver manually. The driver can be found on the CD-ROM or at:

http://ground-zero-audio.com/de/downloads/dsp-software.html

Please note that you should always use the latest DSP-Software. Here you can download all software versions:

http://ground-zero-audio.com/de/downloads/dsp-software.html

Remote Control Unit Features (optionally available)

- 8 -

Demo Mode (Off-Line Mode):

Important Note:

To configure the DSP unit, it has to be

Connecting the DSP to the PC

connected using the enclosed USB wire to the PC with the previously installed DSP software. The head-unit and the DSP unit has to be turned on before starting the DSP software. The DSP software starts by clicking the desktop icon. The start screen will appear and the GZDSP 6-8x unit has to be selected as device (Select Device) .

It´s possible to use the PC software without having the DSP unit connected, to become familiar with most of the software features.

We don´t recommend to use any passive extension cord with the supplied USB wire, as the proper function can´t be ensured. If the enclosed wire is too short, we r ecommend a suitable USB wire with an integrated repeater. The LED next to th e USB p ort will light up blue as soon as the DSP unit has been connected to the PC.

- 9 -

Select Device

RS232 Setting

Connect

Note:

problem remains, the description on the following page has to be noticed

Now the „Click here to test“ button should be chosen.

All 4 points should be checked.

[OK] Click here to start

After the DSP unit has been selected in the „ the „ selected automatically and varies depending on the computers environment.

By clicking the „ automatically.

The COM port will be assigned automatically by the Windows™ operating system. Please note that this may be one of the COM1 to COM9 ports. If any

By clicking the „

Selecting the USB COM-port

“ window will appear. Usually the correct COM port will be

“ menu,

“ button the GZDSP 6-8X will be connected to the PC

” button will open the “Channel Matrix”

- 10 -

If this message will appear, the operating system

In this case the correct COM port would be number 3

Important note:

Error Message using wrong USB COM-Port

assigned the wrong COM port or it was not possible to assign one of the COM1 to COM9 ports due to environmental issues of the PC. The COM port assignment may be checked with the operating systems device manager.

Close the pop-up window by clicking „ possible to select the correct COM port at the „Select COM“ window.

If the assigned COM port is COM10 or higher, one of the unused COM ports 1 to 9 has to be deleted in order to change the previously automatically assigned COM port for the „USB-SERIAL CH340“ device to the one that has been deleted now.

“, now it is

- 11 -

1 2 3

4 5 6 7 8 9 1

Input selection

MAIN AUX SPDIF

Gain

speakers.

SOURCE

Features of the User Interface

- RCA or High-Level Audio Input

- 3.5 mm / 1/8“ Stereo Jack

- optical TOSLINK input

Main volume control

- Main volume (-40dB to +12dB).

Caution: The controls have to be used carefully to avoid damaging the

- 12 -

Channel selection

Clicking the -Icon will invert the left and right inputs.

Warning

CH SETTING

Trying to synchronize (link) two channels, which have already been adjusted separately, will cause a pop-up warning.

Confirming this with OK will reset all channel wise done previous adjustments. This can not be revoke. Therefore, either a separate adjustment is recommended or alternatively the copyfunctions

or can be used.

Clicking the

-Icon will link the relevant pair of channels allowing function

adjustments simultaneously (Crossover / Slope / Equalizer) for both channels.

Simultaneous adjustment of channel A and B

Independent adjustment of channel A and B

Clicking

will copy the current adjustment of the left channel to the right channel.

will copy the current adjustment of the right channel to the left channel.

- 13 -

Configuration of in- and outputs

Input

Output

Speaker Type Input-MIX – Input summing of filtered signals

SUBL+SUBR: Lowpass filtered audio signal

CHANNEL MATRIX

This setup should be chosen if the head-unit has filtered (HPF/LPF/BPF) pre-amplified output channels. All 6 input channels will be summed to a full-range audio signal.

Outputs A+C+E+G receive a summed audio signal from the input channels FL+RL+SUBL Outputs B+D+F+H receive a summed audio signal from the input channels FR+RR+SUBR

We recomm end to connect the input channels as follows FL+FR: Highpass filtered audio signal RL+RR: Bandpass filtered audio signal

– Assignment of the corresponding input channel to the respective output A – H. The following input options are available:

Channel A/B : F-L ( Channel C/D/E/F : F-L (

Channel G/H: F-L (

Front-L) and F-R (Front-R) Front-L) and F-R (Front-R)

or R-L (

Rear-L) and R-R (Rear-R)

Front-L) and F-R (Front-R)

or R-L (

Rear-L) and R-R (Rear-R)

or SUB-L and SUB-R or F-L+R ( or R-L+R (

Mono-summation of Front-L and Front-R) Mono-summation of Rear-L and Rear-R)

or SUB-L+R (Mono-summation of SUB-L and SUB-R)

or F+R-L (

and F+R-R (Summation of Front-R and Rear-R)

Summation of Front-L and Rear-L)

– Clicking the corresponding channel will allow adjustments of crossover, slope and equalizer functions. Same as CH Setting (2) function.

– Preselection of the connected speakers.

3 different options can be chosen. OFF – Channel deactivated Fullrange – Expertmode. All filters deactivated Tweeter (A/B) –Highpass filter preset 3000 Hz (12 dB) Midrange (C/D) –Bandpass filter preset 250 / 3000 Hz (12 dB) Kickwoofer (E/F) –Bandpass filter preset 80 / 250 Hz (12 dB) Subwoofer (G/H) –Bandpass filter preset 20 / 80 Hz (12 dB)

- 14 -

Channel configuration

Select

Gain

Delay

Gain –

Delay(ms)

Warning

(5)

Delay(ms)

Phase

Speaker distance entry

Delay(ms)

GAIN & DELAY

SPEAKER DISTANCE

– Marking the Select-box allows to group the respective

channels together for combined adjustments of

and

Adjusting the output level of the respective channel

– Adjusting the time alignment of the respective

channel. Displayed in milliseconds.

It is recommended to fill-in the measured distances of the speakers to the listening position first tuning afterwards at

and realize the fine-

– 0 / 180° Phase inversion of the respective channel

– Mute of the respective channel

Before realizing the fine-tuning of each speakers time alignment in window 4

, the measured distances of all connected speakers should be added to the graphic. The distances can be measured with an usual measuring tape.

The exact distance between listening position (head) and cone center of each speaker must be measured.

The explanation of a correct implementation on the following page can be used as an application example.

- 15 -

Example of use

Warning

3. If that failure notice pops up, one of the two identical distances must be reduced by 1 cm. point 5

Delay(ms)

1. All measured distances (cm) must be added to the graphic.

2. The speaker with the largest distance will be set as the reference with the button

The number of channels with the maximum distance must be 1. In case of 2 channels with maximum distance (for example mono subwoofer at G/H) a failure notice will pop up.

In this case the instruction from After editing the numbers correctly the background of the button turns to red ->

4. Clicking the button data to the

5. In case of 2 channels with largest distance, one of these two identical numbers must be reduced by 1cm. Subsequently the

will cause the calculation of the respective time alignment and transfer the

list.

button must be clicked. Finally the background turns to red ->

on must be followed.

6. Now the real value can be re-edited Clicking the button

the data to the

will cause the calculation of the respective time alignment and transferring

list.

- 16 -

Activating the filters and choosing the slope

Important

Adjusting the cutoff frequency

Note

Hint:

SLOPE

Before choosing the filter, a Speaker type must be defined in window 3.

Highpass (HP) / Bandpass (BP) and Lowpass (LP) can be chosen.

A slope of 6/12/18/24/30/36/42/48 dB/Oct can be selected.

CROSSOVER

The filters can be adjusted continuously from 20 – 20000 Hz.

The controls can only be used if a filter (Slope/6) has been selected

frequency directly with the cursor at the frequency chart (8). Click and hold the red (HPF) or blue (LPF) dot with the cursor and move it to the desired point on the frequency chart.

crossover point by typing the required value directly into the box above and confirm with >ENTER< or by using the up/down cursor buttons.

first.

: If a filter has been selected, it is possible to adjust the crossover

Instead of using the crossover control, it is possible to adjust the

- 17 -

Function of the frequency diagram

Adjusting the parametric 31-band equalizer

FREQUENCY DIAGRAM

The frequency chart displays the adjustments of the 31 band equalizer (9) and the setting of the crossover (7) for every output channel or a pair of output channels.

Furthermore the curves can be adjusted individually using the mouse (drag&drop).

EQUALIZER

The output channels A to F can be equalized by adjusting 31 frequency bands (20 - 20000 Hz) using the controls (-18 to +12dB) individually. The subwoofer output channels G/H offer 11 bands (20 - 200 Hz) to adjust the audio signal. Each frequency can be adjusted individually in 1-Hz steps in the F(Hz) window. Additionally it is possible to change the filter Q (bandwidth/slope) by typing the required value directly into the box below each band control (0,5/narrow - 9,0/wide) or by using the up/down cursor buttons.

Furthermore the curves can be adjusted individually in window 8 using the mouse (drag&drop).

The EQ-function can be deactivated with the

Using the not affected).

button will cause a full reset of the EQ-setup to factory setting. (Other adjustments are

button without resetting the EQ-setup.

- 18 -

Features of the „FILE“ Dropdown Menu

*Important

PC Contrl

Opens the „Select COM“ window (page 9)

Open

Opens a setup file that has been saved previously to the PC memory Save

Saves the current setup as a file to the PC with unmodified filename. If no filename has been selected yet, the dialogue will ask for the inp ut.

Save as

Saves a setup file with a certain filename.

Factory setting

Sets the unit to default settings

Class-D AMP Setting

No function

Write to Devic e*

Saves the current setting to the preset memory of the DSP unit. At the following window the preset number can be selec ted.

Read from Device*

Opens the preset that has been selected with th e optional remote control GZDSP Remote

Exit

Closes the DSP software

Click „Select Save Place“ and choose one of the presets.

*Note

or an external drive

control unit, it is only possible to use and edit the last preset that has been saved.

: The 10 presets can be used if the optional remote control GZDSP Remote is connected. Without the remote

Saving to the Preset Memory (write to device)

Confirm by clicking „Save to Flash“

control unit, it is only possible to use and edit the last preset that has been saved.

: All presets must be covered in numerical order (Pos 1>Pos 2>Pos 3>…) without skipping a position, otherwise it will not be possible to access the following presets.

: The 10 presets can be used if the optional remote control GZDSP Remote is connected. Without the remote

- 19 -

Digital Sound Processor (application examples)

3-way front system + subwoofer (full active)

2-way front system (active) + 2-way or coaxial rear system (passive) + subwoofer

Channel

A/B

Tweeter

Tweeter C/D

Midrange

Midwoofer E /F

Woofer

LP: 150 – 300 Hz

G/H

Subwoofer

LP: 50 – 100 Hz

Subwoofer

LP: 50 – 100 Hz

Note:

GZDSP 6-8X offers countless possible system configations. Here is a description of the two most common applications:

Highpass filter HP: 2500 – 6000 Hz

Bandpass filter HP: 150 – 300 Hz LP: 2500 – 6000 Hz

Bandpass filter HP: 60 – 80 Hz

Bandpass filter HP: 10 – 30 Hz

Highpass filter HP: 2500 – 4500 Hz

Bandpass filter HP: 60 – 80 Hz LP: 2500 – 4500 Hz

Rear system Highpass filter HP: 60 – 80 Hz

Bandpass filter HP: 10 – 30 Hz

The final crossover points depend on the speakers capacity that have been installed. The technical specifications of the speakers will supply more information about possible applications and suggested crossover points. Above, these are just noncommittal examples. Ground Zero will not be legally responsible for any kind of damage of speakers or other components caused by wrong settings.

- 20 -

Technical Specifications

Model

GZDSP 6-8X

Type

Frequency Response

5 Hz – 20 KHz

(-3 dB)

Signal to noise ratio

Channel separation

Harmonic distortion

Processor

Input sensitivity

High level: 2 – 15 V RMS

Aux inpu: 0.6 – 5 V RM S

Input impedance

Output

Input

Main: 6 x RCA audio socket / 6 x high-level

Digital: TOSLINK optical 12 - 96 kHz stereo

Remote out

Recomended fusing

Dimensions (heatsink) W x H x L mm / inch

Dimensions (total) W x H x L mm / inch

Software compatibility

Presets

Gain bandwith

Equalizer

Time alignment

Crossover

Phase switch

Optional remote control (GZDSP Remote)

8 channel DSP unit

>110 dB

>60 dB

0.05%

Cirrus Logic Sing le Core 32 bit, 8 channel, 192 kHz

Low level: 0.6 – 5 V RM S

>47 kOhm

8 x RCA audio socket

Aux: 3.5 mm / 1/8“ stereo jack

Max 130mA

2 A

96 x 39 x 185 / 3.78“ x 1.5 4“ x 7.28“

132 x 42 x 185 / 5.2“ x 1.65“ x 7.28“

Microsoft Windows™ XP SP3, Vista, 7, 8, 8.1,10

10 Individual presets – storing/calling via optional remote control GZDSP Remote

-40 ~ + 12dB

6 x 31 bands on each channel (A-F) (20-20000Hz) -18 to +12dB, Q 0.5 - 9

2 x 11 bands on subwoofer channels (G/H) (20-200Hz), -18 to +12dB, Q 0.5 - 9

0 - 15ms / 0 - 502cm per channel

6 / 12 / 18 / 24 / 30 / 36 / 42 / 48 dB/Oct. BPF / LPF / HPF Butterworth

20 - 20000Hz

selectab le (0˚ / 18 0°) per channel

Main level, subwoofer level,

input mode, preset selection

- 21 -

Error

Control

Help / Solution

-check the fusing

-check the ground connection and wire

signal wire no contact or broken

-check the contact or replace the wire

no audio signal from head-unit

-check the audio output signal of head-unit

-check the r emote out of DSP

-check the amplifiers power supply

non operational source selected

-check the setting

activated >MUTE< function (User Interface)

-check the setting

adjus ted level on optional remote control unit too low

signal wire no contact or broken

-check the contact or replace the wire

no audio signal from head-unit

-check the audio output signal of head-unit

balance or fader control of head-unit not in center position

wrong setup of input and output mode

-check the setting

>GAIN< level too low or >Mute< function (user interface) active

-check the polarity of th e speaker connection

-reduce the volume level

-select the correc t input mode

-pay attention to the input sensitivity of DSP unit

-reduce the volume level of head-unit

-check amplifier input sensitivity >GAIN< level too high

-reduce the >GAIN< level

-select a superior quality head-unit

-the head-unit, the DSP and each amplifier should be wired up to a common ground and +12 Volt connection

signal wire no contact or broken

-check the contact or replace the wire

head-unit defective

-let the audio store or manufacturer check the head-unit

amplifier defective

-let the audio store or manufacturer check the amplifier

DSP unit or amplifier mounted close to an

analog output of an OEM MOST head-unit connected

Detecting Possible Errors

No function PWR LED on?

No sound

(PWR LED on)

Single channels with no function

Impure sound,

incorrect stereo

reproduction

Distorted sound

quality

Increased

noise level

Car specific

interferen ces

audible through

the audio system

amplifier not switched on

inverted phase of one or more speakers

speaker overload

DSP input override (distortion)

head-unit output override (distortion)

amplifier override (clipping)

head-unit creates noise

diverse power supplies or ground connection

automotive control unit

-check the r emote wire

-check the + 12 Volt connection and wire

-check the setting

-check the setting of th e head-unit

-check the setting

-check the polarity of the high-level input

-check the >PHASE< setting

-check the > TIME ALIGNMENT< adjustment

-check the highpass filter and slope

-set the sound controls of head-unit to center position

-deactivate the >Loudness< function of head -unit

-reduce the level

-use the optical output (if available)

-let the audio store or manufacturer check the head-unit

-choose another mounting position

-connect the digital MOST audio signal directly to the DSP unit*

*Note: Use an optional car specific interface to connect the digital MOST audio signal directly to the GZDSP 6-8X

- 22 -

Erlenweg 25, 85658 Egmating, Germany

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

www.ground-zero-audio.com

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

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 th e right to make needed change or improvement to the product without informing

De Garantie bepa lingen van alle door ground zero g eleverd e prod ucten is volgens wettelijke

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

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

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

veranderingen of verbeteringen aan het product door te voeren zonder de kla nt hierover te inform eren.

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

den Kunden darüber zu informieren.

customer about this in advance.

des modifications ou des

améliorations au produit sans informer le client.

Ground Zero GmbH

Ground Zero GZDSP 6-8X Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual