Mode d’emploi Blaupunkt GTA 4100B Amplificateur de voiture

Mode d’emploi

3

GB

Introduction

Congratulations on your purchase of a high-quality GTA power

amplifier. By selecting the GTA 4100B, you have chosen a product

which delivers superlative reproduction quality. Whether you are

upgrading an existing system or using the GTA power amplifier in

a new system, you are certain to notice immediate performance

benefits!

We provide a manufacturer guarantee for our products bought within

the European Union. You can view the guarantee conditions at

www.blaupunkt.de or ask for them directly at:

Blaupunkt GmbH, Hotline CM/PSS 6, Robert Bosch Str. 200,

D-31139 Hildesheim, Germany

Recommendation:

A power amplifier’s performance is only as good as its installation. Proper

installation will maximise the overall performance of your audio system.

We recommend that you have our product installed professionally. Should

you decide to install the amplifier yourself, however, please read through

these instructions carefully, and take your time over the installation.

Finally, a word about your health: please bear in mind when playing

music in your car that sustained sound levels above 100 dB can dam-

age your hearing and may even result in total hearing loss. Modern

high-performance systems and high-quality loudspeaker configurations

are quite capable of generating noise levels above 130 dB.

Safety precautions

Instructions for installation and connection

Fit a fuse in the amplifier power line no more than 30 cm from the vehi-

cle battery, in order to protect the battery in the event of a short-circuit

between it and the power amplifier. The amplifier’s own fuse protects

the amplifier itself, but not the car battery. Disconnect the negative

terminal of the battery before carrying out installation and connec-

tion work.

Observe the vehicle manufacturer’s safety instructions (regarding air-

bags, alarm systems, trip computers, vehicle immobilisers).

The final stage must be installed professionally for reasons of safety.

The mounting surface must be suitable for the screws provided, and

must provide firm support.When drilling holes, take care to avoid dam-

age to vehicle components (battery, cables, fuse boxes). Fit the amplifi-

er in a suitable location, e.g. beneath the seats or in the trunk (Fig. 1).

The mounting location must also be dry, and provide sufficient ventila-

tion for cooling of the amplifier. Use cable grommets when passing ca-

bles through holes with sharp edges. Use loudspeakers with an imped-

ance of 2 to 4 Ω. Observe the max. power handling specifications (mu-

sic output). Do not connect the loudspeakers to ground; only use the

terminals provided. The cross-section of the positive and negative ca-

ble must be at least 6 mm

2

.

Amplifier GTA 4100B

The amplifier is suitable for connection to car radios with Cinch

connector.Use the Blaupunkt ISO Cinch adapter to connect the

amplifier to car radios with ISO connector. (7 607 893 093/ 7 607

855 094)

Applications and loudspeaker connection:

Positive / negative connection

We recommend a cable cross-section of not less than 6 mm

2

. Run a

standard commercial positive cable to the battery and connect to the

fuse holder. Use cable grommets when passing cables through holes

with sharp edges. Bolt a standard commercial negative cable to a ground

point free of induced noise (car body bolt, body panel) - not to the neg-

ative battery pole. Clean the contact surface of the ground point down

to bare metal and coat with antiseize graphite petroleum.

Integral fuses

The integral fuses within the amplifier protect the final stage and the

entire electrical system in the event of a fault. Never bridge fuses or

replace fuses with a higher current rating.

Example connections

Power supply connection ............................................................ Fig. 2

Loudspeaker connections ..................................................... Figs. 3 -7

Connect remote amplifier connection to switchable

+12 V power source.

This enables the amplifier to be switched on and off with the radio’s On/

Off switch.

Gain control

The gain control enables the input sensitivity of the final stage to be

matched to the output voltage of your car radio preamp output.

The range of adjustment extends from 0.1 V to 8 V.

Adjust the input sensitivity in accordance with the manufacturer’s spec-

ifications when connecting the amplifier to other radios.

Important: Turning the gain control clockwise increases the input sen-

sitivity of the amplifier, and thereby also the volume. The gain control is

however not a volume control; an increase in volume is not achieved in

the maximum position, even if this subjectively appears to be the case.

The system merely increases the volume more quickly when the vol-

ume is turned up on the radio.

Tri-mode loudspeaker connections

GTA amplifiers can be used in a combined mono/stereo mode (Fig. 7).

This facility enables the amplifier to be uq˚d simultaneously with stereo

satellite speakers (mid-range and tweeter) and a mono subwoofer.

The connections are somewhat more complicated in this case, as they

require the use of passive crossover networks (not supplied with the

amplifier) which divide the frequency ranges between the various loud-

speakers.

CAUTION: In tri-mode (combined mono/stereo mode) the amplifier must

be presented with a load of at least 2 Ohms (stereo satellite speakers)

or 4 Ohms (mono subwoofers). Lower loads cause overheating of the

amplifier and may damage it permanently.

Loudspeaker connections

(If the amplifier is to be connected in a bridged mode, proceed with the

section “Bridged loudspeaker connections”.)

As with any audio component, connection of the amplifier and speakers

with the correct polarity is essential for good bass reproduction. Ensure

therefore when connecting that the positive (+) amplifier terminal is con-

nected to the positive (+) loudspeaker terminal. The same applies to the

negative (-) terminals. The left-hand amplifier channel must also be con-

nected to the left-hand loudspeaker and the right-hand amplifier chan-

nel to the right-hand loudspeaker. Loudspeaker, 4 Ohm (min. 2 Ohm).

Bridged loudspeaker connections (see fig. 4)

The GTA can also be bridged in a mono configuration. This enables you

to use the amplifier for one or more subwoofer(s) or a mid-range speak-

er. In this configuration the amplifier sums the right-hand and left-hand

channels, delivering a single channel (mono) output.

Note: The amplifier can sum the right- and left-hand signal information

only if both the right- and left-hand RCA connections have been made

(see fig. 4a).

CAUTION: The amplifier must be presented with a load of 4 Ohms

or higher in bridged mode. A lower load will cause the amplifier to

overheat or switch off. This can lead to permanent damage of the

unit.

Adjustment of the type and range of the cross-over frequencies.

Note: If the amplifier is to be used in the tri-mode configuration, the

crossover frequency selector switch must be set to “Flat” in order to

make the full frequency range available.

Quadro mode

Max power

Stereo mode

Max power

Quadro mode

RMS Power

Stereo mode

RMS Power

Tri mode

Frequency response

Signal-to-noise ratio

Stabilility

Input

sensitivity

Low-pass filter

High-pass filter

Bass-Boost

Preamp - In / -Out

Dimensions

D x W x H (mm)

4 x 100 Watt / 4 Ω Fig.3

2 x 320 Watt /4 Ω Fig.4

4 x 50 Watt / 4 Ω

4 x 80 Watt / 4 Ω Fig.3

2 x 160 Watt / 4 Ω

2 x 200 Watt / 2 Ω Fig.4

Fig.7

10 Hz - 55.000 Hz

> 80 dB

2Ω

0,1 - 8 V

40 - 160 Hz

100 Hz

0 / 9 / 18 dB

gold-plated

328 x 57 x 250

GTA 4100B

+12V

Évaluation

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