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System Type 3
• Type-3A
assumes
that both the
midrange and
tweeter are
mounted close
together in the
same plane, and
therefore relatively
on-axis and
equidistant to the
listener.
• Type-3B
takes into
consideration that
the tweeter and
midrange are
mounted basically
flush to the panel
with little or no
build out. This
results in both an
off-axis condition
and a difference in
pathlength.
System Description
Although the midrange and tweeter are mounted close together in this case, space
limitations, aesthetics or practicality requires that the woofer be mounted separately.
Utilizing the kick panel and door locations is the most common method, though it is
certainly not the only one. What is most significant, is that by mounting the midrange
and tweeter in close proximity with a minimized off-axis angle at the greatest distance
possible, it provides one of the best arrangements for optimum imaging in the vehicle.
Since there are varying degrees of axis and pathlength that will be achievable in some
installations, two basic configurations are provided to accommodate the most common
cases. Keep in mind that the network tuning described below considers the best bal-
ance between driver and passenger listening positions, so all distances and angles are
referenced to the nearest side.