Ground Zero GZDSP 4.80AMP Service Manual

DSP-SERIES

AMPLIFIER

MANUAL

GZDSP 4.80AMP

• 4-channel amplifier with integrated 8-channel signal processor (DSP)

• High efficient 2 Ohm stable class D amplifier

• 6-channel line input (RCA)

• 6-channel high-level input (with auto-on function)

• AUX input (3.5 mm socket)

• TOSLINK input (sampling rate up to 24-bit/96kHz)

• Plug for optional interface (wireless music streaming)

• 4-channel line output (RCA)

• 8-channel signal processor (DSP) - Cirrus Logic single core 32-bit/192 kHz

• Realtime setup of DSP functions (via PC)

• Simple handling, one-page graphical user interface (Windows compatible)

• Channel separated parametric equalizer (6x 31 band / 2x 11band)

• Channel separated time alignment (0-15 ms / 0-510 cm)

• Adjustable crossover (HPF / LPF / BPF - 20 Hz to 20 kHz)

• Selectable crossover slope (6 to 48 dB/Oct)

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

• Memory for 10 user presets (selectable with optional remote control)

• Two optional remote-control units available (GZDSP Remote or GZDSP Touch-Remote)

to adjust main and subwoofer level, select the presets and input mode

• LED power and status indicator (protection circuit)

• Power on delay

• High temperature / short circuit / overload protection circuit)

Feature list

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Important safety notes and installation instructions

Audio connections (input)

Audio connections (output)

High-level input harness

PC software installation

Connecting the unit with a Windows PC

USB port selection

Wrong COM port error message

Software user interface

Channel selection

Channel matrix

Channel configuration (level adjustment and time alignment)

Application example (time alignment)

Adjustment of the crossover

Frequency chart and equalizer

File dropdown menu

Preset memory saving and loading

Technical specifications

Error diagnosis

Warranty conditions

Package contents

• 1 x GZDSP 4.80AMP amplifier

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

• 1 x 4-channel line output harness

• 1 x 6-channel high-level input harness

• 1 x CD-ROM incl. PC software and driver package (for Windows)

• 1 x Owner´s manual (German and English)

• 1 x Fastening Kit

Optionally available:

• Remote-control unit

• Interface

GZDSP BT-Box for wireless music streaming (incl. connecting cable)

GZDSP Remote with LED display incl. connection wire GZDSP Touch-Remote with color LCD display incl. connection wire

Table of content

Application examples of the GZDSP 4.80AMP 17

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GZDSP 4.80AMP

Speaker wires

min 1.5 mm² / 15 AWG

Power supply wir es

min 20.0 mm² / 4 AWG

High-level input wires

min 1.00 mm² / 18 AW

Remote Leitung

min 0.50 mm² / 20 AW

WARNING!

• As a precaution, it is recommended to disconnect the vehic les 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 values of the fuses of each connected device)

• 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 contr ibuting 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 coo ling time,

it will turn on again automatically. To avoid heat buildup, sufficient air supply for cooling must be provided. Never cover the surface of the heatsink entirely.

• The amplifier should not be mounted on a heavily vibrating part or surface (e.g. subwoofer enclosure)

• If a pre-amplified output (RCA) is ava ilable (at the head unit), it is recommended to use it for input wiring

• screwdriver

• electric drill - 3 mm / 0.12“ car bide drill b it

• recommende power wiring

Required parts and tools for the installation

Recommended wiring

Mounting instructions

to excessively high-volume sound levels may cause hearing loss or damage. Also, operation of a motor vehicle while

Select a suitable location that is convenient for mounting, is accessible for wiring and has an ample room for air circulation and cooling.

The unit must not be covered or mounted close to heat emitting objects. Because of the high operation temperature (up to 80°C), it is

important to ensure sufficient distance to any heat-sensitive object . Especially the distance between GZDSP 4.80AMP and any plastic part or

electronic component should be at least 3 cm (1.18”).

You may use the unit as a template to mark the mounting holes, then remove it and drill the marked holes. Finally mount the unit with the

mounting screws.

Choose a mounting position where all electric wires are protected from being damaged 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 the fuse(s), make sure to use only an equivalent one. Using inferior fuses may

cause serious damage to your unit, wiring or even your cars electric. Any kind of damage traced back on disregard of these notes will not

be covered by the warranty!

High powered audio systems in a vehicle can generate "Live Concert" levels of sound pressure. Continued exposure

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 may lead to potential traffic hazards. In the interest of safety, consumer

electronics recommends listening at lower volume levels while driving.

Selecting a mounting position

Mounting the Unit

Caution

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OPTICAL INPUT

socket

(TOSLINK)

To connect a digital audio source using the optical signal (SPDIF / stereo PCM) Attention: If the digital audio source has no level control, we strongly recommend using one of the available remote-control units. Otherwise the audio reproduction will be applied at max level!

REMOTE CONTROL

socket

To connect one of the optionally available remote-control units GZDSP Remote

GZDSP Touch-Remote

Line Input SUB

Connect the subwoofer line out of the head-unit (if available)

Line Input REAR

Connect the rear line output of the head-unit (if available)

Line Input FRONT

Connect the front line output of the head-unit (if available)

PC CONNECT

(MINI USB socket)

and

status indica tor

To adjust the audio setting the unit must be connected to a PC using the included USB cable

LINE OUT

To connect the included 4-channel RCA line out harness delivering the audio signal of channel

HIGH LEVEL INPUT

The High-Level Input must be used if there´s no pre-amplified output at the head-unit, nor offering

Caution: The high-level input and the line input(s) cannot be used simultaneously. This may lead to malfunction and cause serious damage to the DSP unit.

AUX INPUT

The 3.5 mm socket can be connected to an additional source unit. AUX can be selected as audio 10

PC Link switch

To establish a wired connection to the PC, the switch must be in „USB” position. The “BT” position is without function.

BT BOX socket

To connect the wireless audio interface GZDSP BT-Box or the remote-control unit GZDSP Touch-Remote

Audio connections (input)

(compatible Windows PC with installed DSP software from the CD). The PC can be disconnected when the adjustment is done. The USB cable should not be extended to ensure an accurate communication between the DSP unit and the PC. The indicator next to the MINI USB socket will turn blue as soon as the connection has been established.

E/F and G/H for further amplifiers. The signal can be set using the PC soft ware.

a SP/DIF signal. In this case the head-unit speaker output wires must be connected to the highlevel input harness. By using the high-level input, the DSP unit will turn on automatically recognizing the DC level. It´s not necessary to connect the Remote-In wire to the power terminal.

source using the PC software or one of the available remote-control units.

– both are available optionally.

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POWER INPUT

+12V Positive termin al (battery)

Never connect the remote output wire of a source unit in high-level mode to the remote terminal!

130 mA

with a common current exceeding the limitation, an additional relay is required.

FUSE

Defective fuses must be replaced by fuses with identical values

Status indicator

POWER

green/ok (regular operation mode)

PROTECT red/error (protection mode)

SPEAKER OUTPUT

Channel A/B/C/D speaker terminal

ATTENTION!

GND Ground terminal REM Remote input (in RCA mode)

In high-level mode, the switched voltage at the terminal can be used to turn on additional amplifiers. The current of the remote terminal is l imited to

High-level input harness

Please note that the GZDSP 4.80AMP cannot be used in vehicles with a factory active system installed. That might lead

to serious defects of the amplifier as well as of the vehicle´s electronic system. In case of uncertainty contact your car

Power input & speaker output connections

audio dealer or the car´s manufacturer.

Remote output (in high-level mode)

. In case of using several units

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To install and use the PC software, a Windows™ XP (SP3) operating system (or later) with a USB port is required. The installation will need about 25 MB free memory space. We recommend using 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: www.ground-zero-audio.com

Run the setup.exe file. The installation wizard will install the software for the DSP as usual. We recommend creating a desktop icon. The drivers will be installed automatically during the DSP software installation. The PC requires a restart after the installation of the software

Important note for 64-bit operating systems: It might be necessary to install the 64-bit driver manually. The driver can be found on the CD-ROM or:

www.ground-zero-audio.com

Software update: It´s strongly recommended running always the latest DSP software. The actual version can be downloaded here:

www.ground-zero-audio.com

Connecting the DSP to the PC

Note about the USB connection:

The included USB cable should not be extended to avoid any kind of malfunction of the communication between the

DSP unit and the PC. The LED next to the USB port on the unit will light up blue as soon as the GZDSP 4.80AMP has

established a connection to the PC.

Installing the PC software

+ 14 hidden pages