Precision Power 355cs - Manual (Page 17)

1
crossover installation
The system supports conventional wiring, Bi-wiring or Bi-amping using the
supplied passive crossovers . While conventional (parallel mode) wiring will provide
excellent sound, bi-wiring or bi-amping may further enhance the performance in
no-compromise systems .
Bi-wiring uses a separate pair of speaker wires for the high frequency and low
frequency signal between an amplifier channel and its associated crossover
network . This gives you the option of choosing wire which may have slightly
different sonic characteristics in order to optimize performance of each frequency
range . Also, it reduces the overall wiring resistance between the crossover and
amplifier, much like the use of larger gauge wire . This option provides the most
benefit when the crossover network is mounted a long distance away from the
amplifier . If the crossover is mounted close to the amplifier it is doubtful that there
will be an appreciable difference between bi-wiring and conventional wiring .
Bi-amping uses a separate amplifier channel for the high-frequency and low-
frequency sections, instead of the single amplifier channel used in conventional
and bi-wired connections . Bi-amping provides the additional advantage of allowing
use of the amplifier's level controls to provide an additional level of fine-tuning not
possible with the tweeter-level switch alone . In addition, at high power levels, a
bi-amplified connection can help protect the tweeter from amplifier clipping, which
is more likely to occur on channels driving the midrange . When bi-amping using
the passive crossovers, the midrange low-pass filter and tweeter high-pass filter
on the amplifier or external active crossover should be bypassed .
Carefully route the wires from the woofer and tweeter to the crossover mounting
location . The crossover installation location should be reasonably accessible to
allow easy connection of the wires and adjustment of the internal switches . If the
crossover must be mounted in an inaccessible location make the speaker wire
connections and adjustments before final installation . Be sure the installation
location has adequate clearance to allow the removal and replacement of the
cover . Mounting the crossover requires removing the top cover of its housing .
grasp the top cover at the front and back . Compress the cover slightly in the
center and lift it off the bottom of the housing . Mounting the crossover requires
four holes in a rectangular pattern 2 13/16" x 4 1/4" (7 .14 cm x 10 .8 cm) on a flat
surface . Use the crossover as a template for drilling the mounting holes .
Align the mounting holes in the bottom half of the crossover unit with the holes
you have drilled at the installation site . Pass the four #6 x 1 1/4" screws through
the holes in the crossover unit, and tighten them until the assembly is firmly in
place . As before, do not over-tighten; this is especially important if the mounting
surface is not perfectly flat .