GTw 1000, GTw 1200
14
USA
General
Please read these operating instructions before using
the equipment for the fi rst time.
We provide a manufacturer guarantee for our prod-
ucts bought within the United States of Ameri-
ka. The warranty terms can be called up under
www.blaupunktusa.com
or requested directly from:
Blaupunkt USA
2800 South 25th Av.
Broadview, IL 60155
PH: 800-950-2528
FX: 708-865-5296
EM: [email protected]
Safety Notes
Installation and installation instructions
Disconnect the negative terminal
of the battery before carrying out
installation and connection
work.
Observe the vehicle manufactur-
er’s safety instructions (regard-
ing airbags, alarm systems, trip
computers, vehicle immobilis-
ers).
Prior to drilling the mounting holes, make sure that no
cables and parts of the vehicle will be damaged.
Do not install subwoofers on loose rear shelves (fastback
vehicles) or at places open to the front.
Leave ample clearance between the cables and other
harnesses. Use the enclosed cable ducts at sharp-
edged holes.
Notes about installing subwoofer housings
Before installing the housing, please observe some
fundamental design instructions:
Subwoofers with infi nite baffl e can be installed in a ve-
hicle by simply using a wooden board trimmed to size
which ensures an acoustic separation between the front
and rear sound components of a woofer. The wooden
board is affi xed in the trunk under the rear shelf or in
the back of the rear seat bench. Any existing air gaps
should be sealed with sealing material.
The shape of the housing plays only a minor role with
respect to the playback of low frequencies and, there-
fore, is rather freely selectable. However, try to avoid
unusual shapes which require extensive work with re-
spect to trimming and gluing.
MDF boards or high-quality plywood made out of birch
with a thickness of 18 to 25 mm are perfectly suited
for building speakers.
All abutting housing walls should be glued, screwed
together and sealed to avoid a continuing detachment
due to vibrations and environmental infl uences in the
vehicle.
To avoid vibrations, stiffening ribs are useful for large
speakers.
Acoustic insulating material (sheep's wool or poly-
ester web) which fills the inside volume to at least
50 percent increases the effective housing volume by
5 to 15 percent.
The cables from the amplifi er to the subwoofer should
be kept as short as possible and have a cross-section
of at least 2.5 mm
2
.
The fi nished subwoofer housing should be perfectly
stable and airtight.
If possible, use bass refl ex channels with a diameter of
7 to 10 cm to avoid the air noises generally associated
with smaller openings. PVC pipes are available commer-
cially in different diameters, whereby the pipe sections
can be routed inside the housing using appropriate
joints and fi ttings.
Use active (electronic) crossovers, such as those inte-
grated into all Blaupunkt amplifi ers. The use of passive
crossovers is not recommended.
Recycling and disposal
To dispose of the product, please use the avail-
able waste return and collection systems.
Subject to changes!
GTw_1000_1200.indd 14
GTw_1000_1200.indd 14
21.12.2007 9:59:14 Uhr
21.12.2007 9:59:14 Uhr
