Klipsch P-27S, P-37F, P-38F Treble Compression Driver, Crossover Network, Loudspeaker Components

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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 configura- tion. The titanium dome and surround are formed as one common unit.

The chamber behind the tweeter dome is resistively damped via a filled tube to

reduce reflection 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 offers numerous benefits, 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 amplifier. 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- fier, so the driver can maintain full dynamic capability at any volume level.

This driver is inherently flat 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		Bass Network
Through very accurate driver engineering, the system offers 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
Mid and Treble Network	with all air-core inductors, ensure
	best performance and longev-
	ity. The network produces

afourth-order electro-acoustic filter when combined with the smooth, natural roll off of the drivers.