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SOUND QUALITY
.A good audio system will faithfully reproduce the original recording by offering accurate
frequency response and staging. Good frequency response reproduces high tones such as
symbols, through human voices and most instruments, and down to the very low tones from
synthesizers and drums. Frequency response includes timbre (the accurate replication of an
instrument), linearity (the tonal quality is the same regardless of volume level), and c/&v (lack
of distortion of the original signal). Blaupunkt speakers address these properties by having a very
smooth frequency response with low distortion levels.
Good staging offers the illusion of a stage upon which players are located and it has a sense of
height, width, and depth. Imaging is a sound system's ability to correctly place the instruments
on the imaginary stage. Again, the Blaupunkt speakers excel here due to angled tweeter
mounting and smooth off-axis frequency response ensuring accurate reproduction.
LOUDNESS
It is fairly easy to build a sound system that plays loud but has very poor tonal accuracy. This is
done by simply placing lots of amplifiers and subwoofers in a car without attention to midrange
and high frequency speakers and ignoring their positioning. But, with some basic attention to
design, a loud system can also play accurately. In most vehicles, 50 watts per satellite speaker
(midrange/tweeter) and 100 watts into 2 subwoofers will provide nearly 120 decibels across the
audio spectrum of 20-20,000 Hz. This is the threshold of instantaneous permanent hearing loss
so it is useless (and dangerous) to add much more than 400 watts of system power.
MOUNTING SPEAKERS IN BOXES
We often receive calls from people wanting
to install their speakers into custom made
boxes. We whole heattedly support this
concept since the box provides an acoustical
"air-spring" for the woofer thus lowering
distortion and increasing power handling
compared to that of a free-air installation in a
car door.
These volumes are dictated by the speaker's
"Thiele-Small" parameters which are noted in
the TECHNICAL SPECIFICATIONS section
of this manual. Since the "Qts" values are all
around 0.70 for this family of speakers, a
sealed box is the ONLY recommended
enclosure design. It must be understood that
a supplementary subwoofer is needed for
music below 100 Hz. Please note the
attached table for recommended box
volumes and dimensions for best
performance.
HEIGHT
MODEL
VOLUME
0.10 C" ft.
0.15 C" ft. I 0.20 C" ft.
130
f3 (Hz)
8.5
I
HEIGHT
6.2
5.7
DEPTH
Optimum box volumes (cubic feet) for the
given woofers. Dimensions are given in
inches with wood thickness assumed as 3/4
inch.
EPTH
110
90
9.5
I
11.0
8.0
9.5
6.1
6.9
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