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These two factors causing distortion in bass drivers are practically
eliminated by the combination of an aluminum shorting ring within the
magnet structure, the aluminum phase plug on the pole piece, and a
shorted copper turn on top of the pole piece. The aluminum phase plug
smoothes response and also contributes as a heat sink for the voice coil,
reducing power compression. Long voice coils for all woofers (in a
narrow gap) ensure high and uniform BL vs. excursion, to maintain
dynamic linearity. The result is unbelievable clean bass/midrange
reproduction.
Laminated Sandwich Cone
The cones are constructed from a fine weave fiberglass cone material
along with a laminate of compressed, felted fiber laminate. This creates a
stiff but still dampened cone that will remain stable even under very large
sound pressures. In addition, a central dustcap gives a second
connection between the cone and voice coil. This triangulation provides
an incredibly rigid assembly for clean response to high level inputs.
CROSSOVER DESIGN
Great components and construction alone will not guarantee a good
sounding system. More than anything, the crossover is what defines the
sound of a speaker. The crossover determines the band of operation of
each driver and determines how seamlessly the units transition from one
range to the next. It sets the octave-to-octave balance that defines the
personality of the system. At PSB, years of design experience, highly
tuned sets of ears, and the unsurpassed facilities of the National
Research Council in Ottawa, lead to superior crossover design.
With the Synchrony One and Two Towers a unique driver/crossover
arrangement minimizes the unwanted effects of floor bounce induced
early reflections. These reflections interfere with the direct sound and
contribute peaks and dips to the response.
For the entire Synchrony series the crossover slopes are acoustical
fourth order Linkwitz-Riley type with attention paid to the direction of the
“in phase lobe”. The lobe, an inevitable effect of transitioning from driver
to driver, is optimally aimed. Whether seated or standing, the frequency
response of the system does not vary.
Crossover components are chosen to be the best quality possible.
Heavy multi-lamination iron cores are used for large value inductors.
High gauge wire air cored inductors are used medium and small value
inductors. All capacitors are especially low loss. Film capacitors are
used for mid and treble sections. Tight component tolerances and
exhaustive testing in manufacturing ensure that each system is a match
to the engineering references, giving you the sound quality that PSB
designed in.
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Owner’s Manual