VPw 1200 Pro, 1500 Pro
18
Installation and installation
instructions
Disconnect the negative ter-
minal of the battery before
carrying out installation and
connection work.
Observe the vehicle
manufacturer’s safety instruc-
tions (regarding airbags, alarm systems, trip
computers, vehicle immobilisers).
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 shel-
ves (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 vehicle by simply using a wooden board trim-
med to size which ensures an acoustic separa-
tion between the front and rear sound compo-
nents 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 ro-
le with respect to the playback of low frequen-
cies and, therefore, is rather freely selectable.
However, try to avoid unusual shapes which re-
quire extensive work with respect to trimming
and gluing.
MDF boards or high-quality plywood made out
of birch with a thickness of 18 to 25 mm are per-
fectly suited for building speakers.
All abutting housing walls should be glued, scre-
wed 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
polyester 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 per-
fectly stable and airtight.
If possible, use bass refl ex channels with a dia-
meter of 7 to 10 cm to avoid the air noises ge-
nerally associated with smaller openings. PVC
pipes are available commercially in different di-
ameters, whereby the pipe sections can be rou-
ted inside the housing using appropriate joints
and fi ttings.
Use active (electronic) crossovers, such as those
integrated into all Blaupunkt amplifi ers. The use
of passive crossovers is not recommended.
Recycling and disposal
To dispose of the product, please use the
available waste return and collection sys-
tems.
Subject to changes!
VPw_1200_1500 Pro_1208.indd 18
VPw_1200_1500 Pro_1208.indd 18
17.12.2008 13:30:16 Uhr
17.12.2008 13:30:16 Uhr