Blaupunkt GTb 8 A - Introduction and Safety Notes; Introduction; Safety Notes; Installation and Connection

GTb8A
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ENGLISH
Introduction
Please
read these operating instructions before using the
equipment for the first time.
We
provide a manufacturer's warranty for products
bought
within
the European Union. For devices purchased outside
the European Union, the warranty terms issued by
our
re-
spective
responsible
domestic agency
are
valid.
The warranty
terms can be called
up
from
www.blaupunkt.com.
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 sections
of
the
positive and negative
cables
must
not
be
less
than
1.5
mm
2
(A.W.G.
16).
-
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
GTb
8 A must be secured
in a professional way.
When selecting the
installation
location,
select
a
dry
loca-
tion
that
offers sufficient air circulation
for
cooling
the
amplifier.
The
GTb
8 A must
not
be
installed
on
rear shelves, rear seats
or
other locations
that
are open
to
the
front.
The amplifier power
cable
must be fitted
with
a fuse no more
than
30
em
from the battery
to
protect the
vehicle
battery in
case
of
a short circuit between power amplifier
and battery.
The fuse
of
the amplifier protects only
the
amplifier,
not
the
vehicle
battery.
Switching
on/off
One
of
the special features
of
the
GTb
8 A
is
its
automatic
switch-on.
The subwoofer box
automatically
switches on
if
a music
signal
is
received.
If
there
is
no
music
signal for more than
60 seconds, the
GTb
8 A
automatically
switches off.
4
Connection
(see page
27
I Fig. 1)
Connection
®
is
connected
to
the
positive
pole
of
the
battery and connection
0
to
negative
vehicle ground. The
control
of
the
GTb
8 A
should ideally
be a
two-channel con-
trol,
either via
the
preamplifier outputs or the loudspeaker
outputs
of
the car sound system. A control solely
via the right
or
left channel
is
also
possible since the low-frequency por-
tion
of
the
music
is
generally
identical on both channels.
The preamplifier outputs
are
connected
to
the cinch
(RCA)
sockets@
of
the subwoofer box via a shielded sound
cable.
With control via
the
loudspeaker outputs, the
input
connec-
tions
of
pos.
®I®
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.
TIM
function:
For car sound systems
with
activated
TIM
function,
the
GTb
8 A must be
controlled
via
the
loudspeaker
outputs
of
the car sound system and
not
via the
RCA
inputs
(see
page
27
I
Fig.
1
of
the
operating instructions).
CD
Upper
cut-off
frequency
0
Phase
position
®
Input
sensitivity
0
Connector cable
®
Right loudspeaker
input
®
Left loudspeaker
input
0
-Ground
®
+Battery
®
7.5
A fuse
@
Status
display (Power)
@ Preamplifier inputs
Settings
The
following
control setting
is
recommended
as
basic set-
ting
before
putting
the
device
into
operation: Sensitivity
(gain)
Pos.
®to
minimum, phase
Pos.
®to
0°,
filter
(cross-
over)
Pos.
CD
to
approx.
80
Hz.
Switch on the device and
select
a musical piece
with
distinctive
bass
playback.
Increase the volume
of
your stereo system
to
the desired
volume level.
Now
slowly
increase the gain
control®
until
you can hear a
clear
amplification
of
the
bass
level.
Next,
use
the crossover control
CD
to
select
a
filter
setting that provides
a
well-contoured
bass.
You
may have
to
alternately
optimise
the gain control setting
0
and the
filter
setting
CD.
A droning
bass
with
excessive
volume
requires a
filter
setting
with
a
low
frequency.
The phase switch must be set
so
that
the
bass
is
integrated
into
the acoustic pattern
as
best
as
possible and
not
recog-
nisable
as
an individual source.
Also
check your settings
of
the
GTb
8 A
with
the
bass
control
fully
open and,
if
necessary,
with
activated
loudness.
An
overloading
of
the
subwoofer box by selecting an excessive
amplification (pos.
G))
results in a distorted playback and
can
dar:nage
the
loudspeaker.