BRAX GX2000 Manuel utilisateur

GX2000

Instruction Manual

Congratulations on your purchase of this high-quality BRAX amplier.

With the amplier BRAX GX2000 you have chosen a product which combines ultimate perfection in sound and technical

maturity with a maximum of individuality. Only hand selected components and nest materials are used in the amplier‘s

production process and thus guarantee a top-class high-end music experience.

For more than 30 years we have been working on the development and manufacturing of top-notch audio components.

The brand BRAX has worldwide an excellent reputation for superior quality. Various honours by the world‘s major car audio

magazines and, last but not least, numerous innovation awards are the proof of our excellent work.

We have provided the amplier BRAX GX2000 with everything it requires in order to set new standards concerning sound

quality, manufacturing, and longevity. We are very proud to offer you this high-end product MADE IN GERMANY.

We wish you many hours of enjoyment with your BRAX GX2000.

AUDIOTEC FISCHER GMBH

Heinz Fischer

Founder and Managing Director

DEAR CUSTOMER

Your amplier BRAX GX2000 has the serial number:

Based on our basic principles “handmade” and “made in Germany” we have designed the amplier BRAX GX2000 accord-

ing to the latest technical knowledge. The result is both a top-class amplier and a true high-end statement: A long lasting

period of research and development, innovative technologies and an extremely fastidious manufacturing combined with

the love for music as the driving force for our work make the BRAX GX2000 doubtlessly to one of the most powerful and

best sounding 2-channel ampliers.

Concerning the straight design of the GX2000 amplier and the sophisticated layout of the circuit board, we have deliber-

ately set crossovers and lter functions aside. Short signal paths combined with selected components “made in Germany”

ensure pristine listening pleasure and underline the puristical high-end philosophy of BRAX ampliers.

In order to completely eliminate power differences and manufacturing tolerances, we only use hand-selected transistors

for the production of each GX2000 amplier. Concerning power-, voltage- and resistance data we select them in more

than 300 categories. Thus, all transistors harmonize perfectly in terms of technical specications. In doing so, our BRAX

ampliers obtain a worldwide reference status. Striving for ultimate perfection, Audiotec Fischer is the only manufacturer

of audiophile products on the globe that conducts this extensive and time-consuming hand-selection. Of course, all mea-

surement devices which are necessary for this procedure are in-house developments.

In order to control voltage uctuations, an external power stabilizer can directly be connected to the power supply. More-

over, the solid and gold-plated terminals for cables up to 50 mm² make another contribution to an ideal power supply of

the BRAX GX2000.

At the end of the day, the BRAX GX2000 can be described as an amplier with a sound rendition that is highly dynamic,

powerful in an awsome way and swift as an arrow. The underlying philosophy is topped-off by a packaging in a precious

wooden box. Furthermore, each single amplier is manufactured individually and its respective serial number is recorded in

our data-base. The amplier BRAX GX2000 is only produced on demand and of course we can respond to our customer’s

requirements. In this way, each amplier is a valuable individual item that rightly deserves the title “high-end made in

Germany”.

THE BRAX PHILOSOPHY

CONNECTION AND CONTROL ELEMENTS

7 78

Loudspeaker terminals

7Signal inputs

1 2 3 56

Connection remote lead

Connection +12 V battery cable

Connection ground cable

CPS LED

5Connection BRAX Power Stabilizer (plus)

6Connection BRAX Power Stabilizer (minus)

5 5

18 17

13 13 13 13 13

19 19

THE DESIGN OF THE AMPLIFIER

1Ultra-low internal resistance due to solid, gold-plat-

ed terminals; for power cables up to 50 mm² and

speaker cables up to 6 mm².

2External connection for BRAX-Power-Stabilizers,

directly connected to the switching transistors,

guarantee exceptional high efciency and optimum

power stabilization.

3Mini-Blade fuses in parallel (4 x 30 Ampere) in order

to minimize the internal resistance.

4 Eight capacitors, each with 5,000 µF (in total

20,000 µF), take care of an extremely high current

impulse load. Especially designed capacitors with

8-times-contacted wound foils minimize the internal

resistance.

5200 Ampere high-performance switching transis-

tors.

6Interference-free power supply due to optimized

suppression coil up to 120 Ampere with ultra-low

internal resistance.

7 Especially developed transformers with high-ef-

cient core materials guarantee a total performance

of more than 1,000 Watts.

8 Optimum power supply of the transistors due to

12-times-contacted low-impedance capacitors with

a total capacity of 26,400 µF.

9 High efciency due to super-fast Schottky power di-

odes with more than 160 Ampere in total.

10 Optimum power supply of the amplier transistors

due to newly developed storage coils that bridge

the switching delay dead times.

11 Separate stabilized power supply for the driver

section.

12 Best signal processing due to a newly developed

designed driver.

13 32 hand-selected high-end MOS-FET transistors

for brilliant sound.

14 Processor controlled operating data management

of the amplier and power supply. Furthermore

the processor is supervising the whole amplier

and shuts it down in case of malfunctions.

15 Protection electronics

16 High-current relays with Degussa-contacts ac-

count for the internal and external protection of

the amplier.

17 Gold-plated RCA (cinch) inputs and outputs guar-

antee an interference-free signal transmission.

18 Signal inputs with high-end signal capacitors

make an essential contribution to a perfect and

pure sound reproduction.

19 Premium Alps potentiometers adjust the input

sensitivity to the output voltage of the connected

head unit.

20 The solid heatsink, made of a special aluminium

alloy for a perfect cooling of power supply transis-

tors and those of the amplier.

GENERAL INSTRUCTIONS

In order to maintain the quality of this product and to ensure safe operation, we strongly recommend that our

ampliers should be installed by an authorized BRAX dealer. The installation made by a specialist is a crucial

factor for the extended warranty. Your BRAX dealer will assist you by choosing the perfect matching components.

General instructions: Installation of BRAX ampliers

To nd out how BRAX GX2000 works best for you, read this manual carefully and follow the instructions for installation. We

guarantee that this product has been checked for proper functioning before shipping. Before you start installation, discon-

nect the car battery at the minus pole. Once again we would like to urge you to have the installation work carried out by a

specialist, as a verication of correct installation and connection of the unit is a prerequisite for warranty cover of BRAX by

AUDIOTEC FISCHER Germany.

1. Install your amplier at a dry location in the car where there is sufcient air circulation to ensure adequate cooling of

the equipment. Also ensure that there is sufcient clearance available for making the cable connections and operating the

controls.

2. For safety reasons the amplier must be secured in a professional manner. This is performed by means of four xing

screws screwed into a mounting surface. Before drilling the holes for the screws, carefully examine the area around the

installation position and make sure that there are no electrical cables or components, hydraulic brake lines or any part of

the petrol tank located behind the mounting surface - otherwise these could be damaged. You should be aware of the fact

that such components may also be concealed in the double-skin trim panels/mouldings.

General instructions: Connection of BRAX ampliers

The amplier may only be installed in motor vehicles which have a 12 V negative terminal connected to the chassis ground.

Any other system could cause damage to the amplier and the electrical system of the vehicle. The positive lead from

the battery for the complete system should be provided with a line fuse at a distance of max. 30 cm from the battery. The

amperage rating of the fuse is calculated from the maximum total current input of the car audio system.

Never bridge fuses or replace them with fuses with a higher amperage rating as such actions can destroy both of

the amplier and the entire electrical system of the vehicle.

Install the cabling in a manner which preludes any danger of the leads being exposed to shear, crushing or rupture forces.

If there are sharp edges in the vicinity (e.g. holes in the body work), all cables must be cushioned and protected to prevent

fraying. Never lay the power supply cables adjacent to leads and lines connecting other vehicle equipment (fan motors, re

detection modules, gas/petrol lines etc.). In order to ensure safe installation, use only high-quality connection materials.

As an aid to calculating the cross-sectional requirements of power cables which are not longer than 5 m, we recommend

max. 5 A per mm². For the amplier BRAX GX2000 we suggest a minimum cross section of 35 mm² for the positive 12 Volt

supply lead and for the ground (chassis) cable. The remote lead should have a cross section of at least 1 mm². In order to

ensure the ideal sound quality and a distortion-free music rendition, please make sure that all cables are securely xed in

the respective terminals.

INITIAL START-UP AND FUNCTIONS

1 Connecting the remote lead

The remote lead is connected to the remote output of the head unit/car radio. This is only activated if the head unit is

switched ON. Thus the amplier is switched on and off with the head unit.

2 Connecting the battery cable

Connect the +12 V power cable to the positive terminal of the battery. Recommended cross section: min. 35 mm².

3 Connecting the ground cable

The ground cable should be connected to a central ground reference point (this is located where the negative terminal of

the battery is grounded at the metal body of the vehicle), or to a bright bare-metal location on the vehicle chassis, i.e. an

area which has been cleaned of all paint residues.

4 CPS - Colour Protection System

The LEDs show the operation status of the amplier. Green ashing = startup of the amplier; Green = ready for use;

Yellow ashing = internal fuse is faulty; Yellow = malfunction: short-circuit at speaker output; Red = overheated: If the amp

shuts off due to overheating it will take some time (depending on the outside temperature) until it switches on again.

5 - 6 Connectors for a BRAX Power Stabilizer

By connecting a BRAX Power Stabilizer peak loads in the power supply will be eliminated. Thus, the amplier has always

enough power for a perfect performance.

7 Loudspeaker terminals

To connect the speaker cables. Never connect the loudspeaker cables with the car chassis ground. It damages your

amplier. All speaker systems must be connected in-phase, this means plus to plus and minus to minus. Inverting plus and

minus will result in the loss of bass rendition. The positive terminal is marked on most speakers.

8 Signal inputs

The amplier has RCA connectors for RCA cables that can be connected to the pre-amplier outputs/line outputs of the

head unit or to a pre-amplier. The connectors are gold-plated to ensure a better signal transmission.

9 Level controls for input sensitivity

These controls can be used to match the input sensitivity of the individual channels to the output voltage of the connected

head unit. To adjust the input sensitivity you have to remove the name plate on top of the amplier with the included hexa-

gon socket screw key. Under this plate are the level controls.

By turning a control clockwise the input sensitivity of the respective channel will be increased. The controls are no volume

controls and are only for setting up the input levels of the amplier to the output levels of the head unit or pre-amplier.

9 9

Remove the name

plate on top of the

amplier to get access

to the level controls

The control range extends from 1.0 V (maximum CW) to 8.0 V (maximum CCW).

10 Operation mode switch

To select the mode of the amplier. This switch is located on the bottom of the amplier.

Stereo: Select the STEREO MODE for using the channels A/B in a 2-channel mode. In this conguration both level con-

trols are activated to adjust the input sensitivity.

Stereo Bridged: Select the stereo bridged mode for using the channels A/B in the mono mode. In this conguration both

channels are bridged to one channel (mono). At position STEREO BRIDGED both signal inputs of the channels A/B

have to be used. In this conguration both level controls are activated to adjust the input sensitivity. The controls should

be set to the same position.

Mono Bridged: Similar as in mode stereo bridged the amplier is switched to mono and both channels will be bridged

to one channel. If you select MONO BRIDGED only the input A has to be used. This can be necessary if there is only

one mono signal available. In this conguration only level control A is activated to adjust the input sensitivity of the bridged

channel pair.

Operation mode switch for channels A/B

STEREO

STEREO BRIDGED

MONO BRIDGED

CHANNEL A/B

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