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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)


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