Level Control - Blaupunkt EMA 255 Bedienungsanleitung

EMA 255
Application options and loudspeaker connection
Stereo mode
Max power
Mono mode
Max power
Stereo mode
Max power
Stereo mode
RMS power
Mono mode
RMS power
Stereo mode
RMS power
Frequency response
Signal-to-noise ratio
Signal-to-noise ratio
Distortion factor (RMS)
Stability
Input sensitivity
Low-pass fi lter
(Low Pass)
High-pass fi lter
(High Pass)
Bass boost
Dimensions
W x H x D (mm)
W x H x D (")
Audio inputs (see Fig. 3)
You can select between 2 diff erent audio inputs;
– Cinch (RCA)
– Hi level (loudspeaker connections)
Use only one of the audio inputs; otherwise, it may lead to
audio interferences.
The preamplifi er outputs are connected to the cinch (RCA)
1
sockets via a shielded sound cable.
With control via the loudspeaker outputs, the input connec-
2 3
tions of pos. / 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.
48
2 x 110 W / 4 Ω Fig. 4, 5
1 x 330 W / 4 Ω Fig. 6
2 x 160 W / 2 Ω Fig. 4, 5
2 x 55 W / 4 Ω Fig. 4, 5
1 x 165 W / 4 Ω Fig. 6
2 x 80 W / 2 Ω Fig. 4, 5
10 Hz - 30,000 Hz
> 85 dB @ RMS power
> 75 dB @ 1 W / 1 kHz
< 0.08 %
2 Ω (4 Ω in bridge mode)
0.2 - 10 V
50 - 250 Hz
80 Hz
0 dB / 6 dB / 12 dB
184 x 52.5 x 183
7.25 x 2.1 x 7.2
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 amplifi er (Fuse) protect the power
amplifi 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 amplifi er with switchable +12 V
voltage source.
This allows the amplifi er to be switched on and off using the
on/off -switch of the radio device.

Level control

The Level control is used to adjust the input sensitivity of
the power amplifi er to the output voltage of your car sound
system preamplifi 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
amplifi er and, therefore, also the volume increases. However,
this is not a volume control; no further amplifi 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 amplifi er is to be jumpered, continue with the section
"Bridged loudspeaker connections" at this point).
As with every audio component, the correct polarisation of
amplifi er and loudspeakers is of essentially importance for a
good bass response. For this reason, ensure that the positive
(+) connection of the amplifi er is connected with the posi-
tive connection (+) of the loudspeaker; the same applies to
the negative (-) connections. In addition, the left amplifi er
channel must be connected with the left loudspeaker and
the right amplifi er channel with the right loudspeaker.
2 .