Blaupunkt THA 1250 PnP Handbuch Seite 6

THA 1250 PnP
Input sensitivity
Direct AUX IN 0,3 V
Low-pass fi lter 50-250 Hz
(Low Pass)
High-pass fi lter 10-250 Hz
(High Pass)
Bass boost 0 dB to +12 dB
Inputs 2 x cinch/RCA,
2 x HighLevel speaker PnP
Outputs 2 x loudspeaker,
2 x cinch/RCA,
2 x HighLevel speaker PnP
Dimensions
W x H x D (mm) 260 x 42 x 160
(10.3"x1.7"x6.3")
Plus / minus connection
- We recommend a minimum cross section of 2.5 mm
(A.W.G. 13).
The 12-V continuous positive cable must be
connected with the amplifi er + cable at the ve-
hicle adapter cable (7 607 622 ...) (see Fig. 6).
- Route a commercially available positive cable to
the battery and connect it via fuse holder 30 cm
from the battery.
- 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 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, 2a
Connection to car sound system
with cinch output ..........................................Fig. 3
Loudspeaker connections ............................Fig. 4, 4a
Remote connection of the amplifi er with
+12V
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.
Note:
If the connection is made using a PnP-INPUT cable,
the switch-on is performed automatically.
!
As a special feature, +12 V/200 mA are now available
as output switching voltage at the remote input/out-
put after automatic switch-on.
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High-level connections (via PnP High-
Inputcable only)
The amplifi er features high-level connections (High
Input) to be able to connect to radio devices without
pre-stage outputs (Fig. 2a). This allows for a direct con-
nection at the loudspeaker output 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.
The adjustment range is from 0.3 V to 8 V.
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 ampli-
fi 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.
2
Loudspeaker connections
As with every audio component, the correct polarisa-
tion of amplifi er and loudspeakers is of essentially
importance for a good bass response. For this reason,
ensure that the positive (+) connection of the ampli-
fi er is connected with the positive connection (+) of
the loudspeaker; the same applies to the negative (-)
connections.
Note:
The amplifi er can add the right and left signal informa-
tion only if the right as well as the left RCA connection
were carried out.
Adjusting the type and range of the frequency
crossovers
With the THA 1250 PnP, the type of frequency crossover
(i.e. "Low Pass" or "Hi-Pass") and the desired crossover
frequency can be adjusted. For example, if a pair of
subwoofers is to be connected, low-pass settings are
required. The crossover frequency is dependent upon
the frequency range of the loudspeakers (see recom-
mended frequency range of the loudspeakers).
High-Pass
At a setting of 250 Hz, the amplifi er has a frequency
range of 250 Hz to 30,000 Hz.
Low-pass frequency control
This control is active if the switch is in the position
"Low-Pass", and allows for setting the desired crossover
frequency.
Example:
At a setting of 150 Hz, the amplifi er has a frequency
range of 10 Hz to 150 Hz.
Bass boost
The bass boost control on the remote control is used to adjust
the bass response of the amplifi er. The adjustment range is
from 0 dB to +12 dB (see Fig. 7).