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)