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We recommend that you have your Blaupunkt woofers professionally installed. If you
choose to do your own installation please note the following important information.
Before cutting any trim or steel make sure you clear all moving parts and factory
electrical lines.
Be sure to leave enough slack in the wire to prevent pulling or stretching wires for
service later.
Tie down all loose wires to prevent them from getting caught in moving parts or shorted
due to abrasion over time.
Never mount speakers in a car's wheel wells or areas where they might be subjected to
moisture or road spray.
Proper speaker polarity must be observed. The polarity positive side is marked by a (+)
sign or a red dot. At low frequencies woofers out-of-phase will acoustically cancel
having little bass output.
Although the components used in Blaupunkt speakers exceed most international
standard, speaker frames can be twisted by improper installation on uneven surfaces.
This can occur when the surface is heavily padded or carpeted and the screws are
unevenly or over-tightened.
When installing more than one speaker per amplifier channel be sure that the combinr' -.'h
impedance values cannot damage the amplifier.
Speaker wire should be isolated from the electrical system of the car and routed away
from any factory systems to avoid noise picked up and fed back to the amplifiers.
Speaker wire size should be of sufficient size to carry the full power of the amplifier (16
gauge or larger sizes are quite adequate for most systems).
The following is a list of materials and sources of recommended reading for the person
interested in loudspeakers, acoustics, and electronics. Subjective comments are listed
accordingly.
DESIGNING, BUILDING, AND TESTING YOUR OWN SPEAKER SYSTEM, David B.
an introductory book on designing speakers for the home but is quite applicable to the
car and is easy reading)
LOUDSPEAKER DESIGN COOKBOOK, Vance Dickason, copyright 1991, distributed by
Old Colony Sound Labs, Peterborough, NH, 03458. (This is a technical step up from
reference.)
SPEAKER BUILDER MAGAZINE, P.O. Box 494, Peterborough, NH, 03458. (This is a bi-
monthly hobbyist speaker magazine but offers tremendous technical information for the
professional as well.)
AUTOSOUND 2000 TECH BRIEFS, 2563 Eric Lane, Suite D, Burlington, NC, 27215.
to the car stereo world. Although sometimes technical, it's well written therefore easy
to understand.)
"BLAUBOX" WOOFER BOX DESIGN COMPUTER PROGRAM, Blaupunkt division of the
Robert Bosch Corporation, 2800 South 25th Avenue, Broadview, IL, 60153. (This is
an IBM personal computer program used to predict the frequency response of a
subwoofer in 10 different enclosures including sealed, vented, bandpass, and isoba
configurations. Two woofers can be graphically compared in different boxes if desi
In addition, it will print out wood cutting "blueprints" to actually build the box with.
Passive Crossover designs are included. The program is sold through authorized
Blaupunkt retailers and distributors.)
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