Bedienungsanleitung Blaupunkt GTA 470 DSP (Seite 7 von 52) (Deutsch, Englisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch)

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GTA 470 DSP

Audio inputs

The preampli er outputs are connected to the cinch (RCA)

sockets via a shielded audio line (see Fig. 3).

Plus / minus connection

– We recommend a minimum cross section of 6 mm

– Route commercially available plus cables to the battery

and connect via fuse holder.

– Use cable glands for holes with sharp edges.

– Securely fasten commercially available minus cables to a

noise-free earth point (chassis screw, chassis metal) (not

to the minus pole of the battery).

– Scrap the contact surfaces of the earth point until they

are bright and grease with graphite grease.

Integrated fuses (2 x 20 A)

The fuses integrated in the ampli er protect the power

ampli er and the entire electrical system in case of an error.

If a replacement fuse is used, never bridge fuses or replace

them with a type with higher current.

Connection examples

Connection of the voltage supply ..................................Fig. 2

Audio inputs ...........................................................................Fig. 3

Loudspeaker connections .................................................Fig. 4 - 8

Remote control connection (optional equipment) ......Fig. 9

+12V

Remote connection of the ampli er with switchable +12 V

voltage source.

This allows the ampli er to be switched on and o using the

on/o -switch of the car sound system.

Loudspeaker connections

(If the ampli er is to be jumpered, continue with the section

"Bridged loudspeaker connections" at this point).

As with every audio component, the correct polarisation of

ampli er and loudspeakers is of essentially importance for a

good bass response. For this reason, ensure that the positive

connection (+) of the ampli er is connected with the posi-

tive connection (+) of the loudspeaker; the same applies to

the negative connections (-). In addition, the left ampli er

channel must be connected with the left loudspeaker and

the right ampli er channel with the right loudspeaker.

Bridged loudspeaker connections

The GTA ampli er can also be bridged for a mono con gura-

tion. This allows the ampli er to be used for one or several

subwoofers or a mid-range driver. In this con guration, the

ampli er combines the right and left channel to a single-

channel output (mono output).

Note:

The ampli er can add the right and left signal information

only if the right as well as the left cinch (RCA) connection

were carried out.

Caution:

In a bridge circuit, the ampli er load must be 4 Ω or

higher. A lower load leads to an overheating or switch-

o of the ampli er and can cause permanent damages.

Subwoofer connection

The GTA 470 DSP features three di erent options of con-

necting a subwoofer:

–An active subwoofer or an additional ampli er are con-

nected with a cinch (RCA) cable to the two SUBWOOFER

OUTPUT sockets (see Fig.7). The setting options of the

integrated DSP (Digital Sound Processor) can be used

in this case.

–A passive subwoofer is connected to the bridged loud-

speaker output (see the section "Bridged loudspeaker

connections"). To be able to use the setting options of

the integrated DSP (Digital Sound Processor), the two

REAR INPUT sockets must additionally be connected with

a commercially available cinch (RCA) cable with the two

SUBWOOFER OUTPUT sockets (see Fig. 8).

–A passive subwoofer is connected to the bridged loud-

speaker output (see the section "Bridged loudspeaker

connections"). The setting options of the integrated DSP

(Digital Sound Processor) cannot be used in this case.

DSP sound settings

(FRONT and REAR loudspeakers)

A variety of options is available to optimise the sound of the

connected loudspeakers:

– GAIN control (FRONT and REAR)

The GAIN control is used to adjust the input sensitivity

of the power ampli er to the output voltage of your car

sound system preamplifier output. The GTA 470 DSP

features separate controls for the FRONT and REAR loud-

speakers. In each case, the adjustment range is from 0.2 V

to 5 V. If a car sound system of a third party manufacturer

is connected, the input sensitivity must be adjusted cor-

responding to the manufacturer data.

A few important explanations in this context:

By turning the GAIN control clockwise, the input sensitivity

of the ampli er and, therefore, also the volume increases.

However, this is not a volume control. In the end position,

it is not possible to achieve a higher ampli er output, even

if it sounds like that at  rst. The system merely increases

the volume faster if the volume control of the car sound

system is turned up.

– FULL/HI/LOW switch and X-OVER control

(FRONT and REAR)

For the GTA 470 DSP, the type of frequency crossover

("Low-Pass" or "High-Pass") and the desired cut-o fre-

quency can be adjusted separately for the FRONT and

REAR loudspeakers. Select the cut-o frequency up to

which lower frequencies (high-pass) or higher frequencies

(low-pass) should be blocked. Only frequencies above

the cut-o frequency (high-pass) or below the cut-o

frequency (low-pass) are passed on to the loudspeakers.

The cut-o frequency is dependent upon the frequency

range of the loudspeakers (see recommended frequency

range of the loudspeakers).

"High-Pass" (switch setting: HI)

With a setting of 80 Hz, the ampli er has a frequency range

from 80 Hz to 30,000 Hz.

"Low-Pass" (switch setting: LOW)

This control is active if the switch is in the LOW position,

and allows for setting the desired entry frequency.

GTA_470_DSP_13LG.indd 7GTA_470_DSP_13LG.indd 7 24.08.12 15:4924.08.12 15:49

Blaupunkt GTA 470 DSP Seite 7

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