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Design download

Extreme-slope crossover networks

A paper describing crossover networks similar to those shown below having slopes on the order of 120 dB / octave in a Belle Klipsch is downloadable here. The article explains their benefits which are improved stereo imaging and a widening of the "sweet-spot". The article also investigates such factors as filter ringing, group delay, driver interaction and time alignment. (by Al Klappenberger).

"A case for extreme-slope crossover networks" (Size 4.3 Meg)

The designs for several of the ALK Engineering networks may also be downloaded below. Anyone wishing to build a set, for his own use, is welcome to do so. I will even be glad to help! I however reserve the exclusive rights to build these networks for sale. The download includes schematic, layout drawings, parts list and photographs.

(Note: These redesigns were done by Al Klappenberger and are in NO WAY sanctioned by Klipsch Inc.)

Download "Universal upgrade" Khorn / Belle Klipsch / La Scala Crossover design (Size: 72K)

Download Klipchorn (Only) 400 Hz ES400T Extreme-slope Crossover design (Size: 1 Meg)

Download Belle Klipsch / La Scala 500 Hz ES500T Extreme-slope Crossover design (Size: 1.4 Meg)

Download Belle Klipsch / La Scala 600 Hz ES600T Extreme-slope Crossover design (Size: 500K)

Download Belle Klipsch / La Scala 700 Hz ES700T Extreme-slope Crossover design (Size: 500K)

Download AP12 series gentle-slope Crossover designs for Belle, LaScala and Klipschorn (Size: 1.8 Meg)

ALK Engineering upgrade for the Klipsch "B series" balancing network found in early Cornwall.

Please note: The Cornwall network is no longer available directly from ALK Engineering. The design is downloadable below for anyone who would care to build it himself.

NOTE: This network is for speakers that have have the K77 tweeter. Speakers that use the T79 tweeter are NOT compatible. You can tell by looking at the back of the speaker. If the back is held on with screws, it IS compatible. If the back will NOT come off, it is the later model and is NOT compatible. This change was made in the Cornwall about 1985.
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Download Cornwall "B series" Crossover design (Size: 240K)

FLASH: The AP12-600 + ES5800 network set has now been found to be a better choice for the Cornwall and the Cornwall II.

ALK Engineering upgrade for the Klipsch Forte I balancing network

This network is for the Forte I. The Foret II and Chorus models are NOT compatible. It is available as a parts kit for $150.00
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Click HERE for details on the development of this network.

Download Forte I Crossover design (Size: 1.7 Meg)

Download designs for CornScala, Jubilee and MWM woofers (schematics only) (Size: 430K)

Go to ALK Engineering home page

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