Connection Examples; Subwoofer Connection - Blaupunkt GTA 1500 D Bedienungsanleitung

In conclusion, allow us a few words about the topic of health
protection:
During the playback of music in your vehicle, please consider
that continuous sound-pressure levels above 100 dB can
lead to permanent damages to the human ear and even to
loss of hearing. Using today's high-performance systems
and loudspeaker confi gurations allows for reaching sound-
pressure levels above 130 dB.
Safety notes
Please observe the following safety notes during the instal-
lation and connection.
– Disconnect the negative pole of the battery! Observe the
safety notes of the vehicle manufacturer.
– When you drill holes, ensure that you do not damage any
vehicle components.
– The cross section of the plus and minus cable may not
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be less than 6 mm .
– Use cable glands for holes with sharp edges.
– An incorrect installation can result in malfunctions of
the electronic vehicle systems or your car sound system.
Installation and connection instructions
With respect to accident safety, the GTA 1500 D must be
secured in a professional way.
When selecting the installation location, select a dry location
that off ers suffi cient air circulation for cooling the amplifi er.
The GTA 1500 D must not be installed on rear shelves, rear
seats or other locations that are open to the front.
The installation surface must be suitable to accept the ac-
companying screws and provide a fi rm support.
The amplifi er power cable must be fi tted with a fuse no more
than 30 cm from the battery to protect the vehicle battery in
case of a short circuit between power amplifi er and battery.
The fuse of the amplifi er protects only the amplifi er, not the
vehicle battery.
Only loudspeakers with 2 - 4 Ω impedance may be used
(see table or installation drawings). Observe the maximum
power handling capacity (music output). Do not connect
loudspeakers to earth, use only the referenced terminals.
Audio inputs
The preamplifi 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.
GTA_1500_D_13LG.indd 5 GTA_1500_D_13LG.indd 5
Integrated fuses (2 x 25 A)
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
Audio inputs ...........................................................................Fig. 3 - 4
Loudspeaker connections .................................................Fig. 5
Remote control connection ................................................Fig. 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 car sound system.

Subwoofer connection

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 positive connection (+) of the loudspeaker; the same
applies to the negative connections (–). In addition, the
left amplifier channel must be connected with the left
loudspeaker and the right amplifi er channel with the right
loudspeaker. Positive (+) and negative (–) connections are
wired parallel internally.
Sound settings
The following options are available to optimise the sound
for the use of a subwoofer:
– X-OVER control
For the GTA 1500 D, the type of frequency crossover
("Low-Pass") can be adjusted. Select the cut-off frequency
up to which higher frequencies should be blocked. Only
frequencies that are below the cut-off frequency are
passed on to the loudspeakers.
Example:
At a setting of 80 Hz, the amplifi er has a frequency range
of 10 Hz to 80 Hz.
– SUBSONIC control
To avoid interferences from extremely low frequencies,
you can use the subsonic fi lter to limit the low-frequency
response of the device. The setting of the subsonic fi lter
suppresses all frequencies below the defi ned frequency.
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.
Example:
At a setting of 40 Hz, the frequency range from 0 Hz to
40 Hz is being suppressed.
– PHASE control
This control allows the stepless change of the phase posi-
tion of the subwoofer from 0° to 180°. It is used for the
fi ne tuning with the other connected loudspeakers and if
set correctly, it can prevent any possibly occurring mutual
cancellation of low frequencies within the audio system.
GTA 1500 D
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