Loudspeaker Components -1
Bass Drivers
With 18 mm peak to peak linear excursion, and three 9” cones, the P-39F is capable
of remarkably clean dynamic response down to a -3 dB point of 39 Hz.
The woofer utilizes a low mass hybrid Aluminum/Rohacell /Kevlar cone with an
over hung voice coil. Even under massive dynamic demand, the driver retains
linearity and low distortion. A three part high intensity neodymium magnet is
used with a main magnet plus rear and forward magnets placed to ensure
linearity, reduce stray magnetic energy and provide intense field strength in the
voice coil gap. Dual Faraday rings on the pole piece minimize unwanted
inductance, enhance heat dissipation and minimize dynamic compression.
The metal cone of the woofer is damped with a
composite Rohacel and Kevlar layers which
minimises ringing and maintains low mass,
eliminating breakup and other distortion products. As is the case with the
midrange driver, the surround uses a flat-sided shape which keeps surround-
produced output to a minimum and preserves phase response. The cast aluminum
frame assures maximum heat transfer without any reflection of the back wave of
the driver that would otherwise alter the sound. An inverted half-roll low density
foam rubber surround completes the clean appearance.
The woofers see differing pass bands. This preserves consistent dispersion through
the critical woofer to midrange transition region and has a positive impact on off
axis performance and stereo imaging. This upper woofer covers the entire range
from 30 Hz to 500 Hz where it crosses over to the midrange driver while the two lower woofers cover only the low
and mid bass. This “tapered-array” design delivers full bass impact plus a graceful transition between driver groups in
both tonal accuracy and dispersion.
Midrange - “The midrange is where we live” Paul W. Klipsch
The inverted dome midrange driver operates from 500 Hz to 3.5 kHz and is a
unique design, not found on any previous Klipsch product.
The driver sensitivity of 106 dB allows minimal excursion at normal playback volume.
As cone excursion reduces, so does distortion. The 4 ½” aluminum dome is driven by
3 high temperature N35H neodymium magnets ensuring linearity under a range of
listening volumes. The pole piece is topped by a copper cap whose purpose is to
minimize unwanted inductive components. The surround has half the density of the
material typically used and thus offers reduced mass. Unlike most designs this
midrange driver delivers much more output from the dome and less from
the surround. As a surround is always in motion and always changing
shape, output from its surface is high in distortion - minimizing surround
surface area is another means to reducing overall distortion.
The midrange unit is housed in its own magnetically shielded sealed
enclosure which isolates the driver from acoustic energy generated by the
woofers. Every effort has been made to ensure great accuracy as well as
long-term durability from this unique driver.
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