Bedienungsanleitung Blaupunkt EMA 255 (Seite 48 von 52) (Alle Sprachen)

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EMA 255

Application options and loudspeaker connection

Stereo mode

Max power 2 x 110 W / 4 Ω Fig. 4, 5

Mono mode

Max power 1 x 330 W / 4 Ω Fig. 6

Stereo mode

Max power 2 x 160 W / 2 Ω Fig. 4, 5

Stereo mode

RMS power 2 x 55 W / 4 Ω Fig. 4, 5

Mono mode

RMS power 1 x 165 W / 4 Ω Fig. 6

Stereo mode

RMS power 2 x 80 W / 2 Ω Fig. 4, 5

Frequency response 10 Hz - 30,000 Hz

Signal-to-noise ratio > 85 dB @ RMS power

Signal-to-noise ratio > 75 dB @ 1 W / 1 kHz

Distortion factor (RMS) < 0.08 %

Stability 2 Ω (4 Ω in bridge mode)

Input sensitivity 0.2 - 10 V

Low-pass  lter

(Low Pass) 50 - 250 Hz

High-pass  lter

(High Pass) 80 Hz

Bass boost 0 dB / 6 dB / 12 dB

Dimensions

W x H x D (mm)

W x H x D (")

184 x 52.5 x 183

7.25 x 2.1 x 7.2

Audio inputs (see Fig. 3)

You can select between 2 di erent audio inputs;

Cinch (RCA)

Hi level (loudspeaker connections)

Use only one of the audio inputs; otherwise, it may lead to

audio interferences.

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

sockets

1 via a shielded sound cable.

With control via the loudspeaker outputs, the input connec-

tions of pos.

2/3 are fed to the closest loudspeaker cables

(front or rear) on the left and right. They are separated and

connected to the input connections. The polarity of the

+ or - connections must be observed. Bridge output stages

(BTL) can also be connected directly without an additional

adapter.

–

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 (Fuse)

The fuses integrated in the ampli er (Fuse) 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. 4/5/6

+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 radio device.

Level control

The Level control is used to adjust the input sensitivity of

the power ampli er to the output voltage of your car sound

system preampli er output.

The adjustment range is from 0.2 V to 10 V.

If a car sound system of a third party manufacturer is con-

nected, the input sensitivity must be adjusted corresponding

to the manufacturer data.

A few important explanations in this context:

By turning the control clockwise, the input sensitivity of the

ampli er and, therefore, also the volume increases. However,

this is not a volume control; no further ampli er output

can be achieved in the end position, even if it may sound

like that at the beginning. The system merely increases the

volume faster if the volume control of the car sound system

is turned up.

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.

–

EMA_255_22LG.indd 48EMA_255_22LG.indd 48 20.02.2013 10:55:04 Uhr20.02.2013 10:55:04 Uhr

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