Voltage Supply; Switching On/Off - Blaupunkt Blue Magic XLb 250 A Mode D'emploi

XLb 250 A • XLb 300 A
Connection (see page 42)
1
Power-on indicator (Power/Protect)
2
Connection for cable remote control
3
Phase position
4
Automatic switch-on
5
Left loudspeaker input
6
Right loudspeaker input
7
Preamplifi er inputs
8
20 A fuse
9
+ Battery
:
Remote connection
;
– Earth
<
Bass boost
=
Upper cut-off frequency
>
Input sensitivity

Voltage supply

– 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.
9
Connection is connected to the positive pole of the
;
battery and connection
control of the XLb should ideally be a two-channel control,
either via the preamplifi er outputs or the loudspeaker out-
puts of the car sound system. A control solely via the right or
left channel is also possible since the low-frequency portion
of the music is generally identical on both channels.
Integrated fuse
The fuse integrated in the amplifi er protects the output stage
and the entire electrical system in case of a malfunction. If a
replacement fuse is used, never bridge fuses or replace them
with a type with higher current.
40
BM_XLb250A_XLb300A_22LG.indd 40 BM_XLb250A_XLb300A_22LG.indd 40
2 .
to negative vehicle ground. The
Audio inputs
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)
7
sockets of the subwoofer box via a shielded sound cable.
With control via the loudspeaker outputs, the input connec-
5 6
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.

Switching on/off

A special feature of the XLb is its automatic switch-on. It is
set via the AUTO TURN ON switch
– REM
Switching on/off via the car sound system. The remote
:
connection of the XLb must be connected with a
switchable 12-V power supply (e.g. switching output of
the car sound system).
– DC OFFSET*
Switching on/off via the loudspeaker connections
5 6
/ .
– AUDIO*
Switching on/off via cinch connectors (RCA)
* The subwoofer box automatically switches on if a music
signal is received. If no music signal is received for more than
60 seconds, the XLb automatically switches off .
GAIN control
>
The GAIN 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.
The GAIN control can also be operated via the enclosed cable
remote control. For this purpose, the remote control must
be connected to the REMOTE
as the remote control is connected, changes made with the
GAIN control of the subwoofer box have no eff ect.
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.
4
:
7
.
2
socket of the XLb. As long
21.10.2011 8:56:48 Uhr 21.10.2011 8:56:48 Uhr