Klipsch P-27C Portable Speaker User Manual


 
Page 16
Loudspeaker Components -2
TrebleCompressionDriver
Low distortion, high sensitivity, wide bandwidth and neutral tonality have been,
in this ground-breaking design, pushed beyond the standards for any previous
Klipsch driver.
Built around a .75-inch titanium dome, the tweeter makes use of two very large
high temperature N35H neodymium magnets in an unconventional congura-
tion. The titanium dome and surround are formed as one common unit.
The chamber behind the tweeter dome is resistively damped via a lled tube to
reduce reection of the back wave—and thereby the distortion that would otherwise be produced.
The phase plug that puts the dome into a compression mode also has a unique chamber within it that extends
the upper frequency limit of the driver. This proprietary technique oers numerous benets, including the elimina-
tion of undesirable standing waves in the high pressure layer between the phase plug and horn. The result is a
smooth impedance transfer function, and a benign load on the partnering amplier. Additionally, this technique
produces smoother amplitude response through the high frequency range. With its unique horn and phase plug,
the tweeter demands far less drive current from the ampli-
er, so the driver can maintain full dynamic capability at any
volume level.
This driver is inherently at from 3 KHz to 30 KHz. and has an
inherent sensitivity some 10 dB greater than direct radiating
designs. Distortion is also reduced by a factor of 10 dB, against
conventional tweeters.
CrossoverNetwork
Through very accurate driver engineering, the system oers excellent perfor-
mance without the need for corrections in the crossover network. A cross-
over should provide a smooth transition from driver to driver, allowing each
element to operate at its optimum performance within its designed frequency
range. This accomplished, the network can be a straightforward design and
use extremely high quality parts without imposing unnecessary budget con-
straints. A simple, elegant crossover also means the speaker will have a more
direct and coherent character as compared with products that must employ
complex networks to iron out their shortcomings. Polyester capacitors along
with all air-core inductors, ensure
best performance and longev-
ity. The network produces
a fourth-order electro-acoustic lter when combined with the
smooth, natural roll o of the drivers.
Bass Network
Mid and Treble Network