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Old System

1991: First contact with Dr. Bruce Edgar’s articles

  • That time, my system (built back in ’95) consists from:
  • Klipschorn Bass unit as active subwoofer (fc-100Hz)
  • Midbass: 8″ Eminence EM8-100 in ported enclosure (doh)
  • Mids: Audax 6 1/2″ Audax PR38TSM… in closed enclosure
  • Heights: Fostex FT66H (before FT50H)


1991: First Tractrix Horn, built for the Audax midrange


1992: First major modifcations

  • Klipschorn bass
  • Downscaled La Scala bass unit for 10″ driver (100-500Hz)
  • Dynaudio D54 in a 300Hz Tractrix horn (500-5KHz, based on the Edgar Midrange Horn article)
  • Fostex FT66H tweeter (5k-20KHz, the big T950A is not connected).

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Soon it became clear to me, that there is so much more potential in a system entirely equipped with horn loudspeakers. I decided to go on.
The small LaScala’s were the next items to be replaced:

The Tractrix Midbass

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Later with a new rack


But soon, new incidents influenced my tinkerings.

Fostex D582 compression drivers


150Hz Tractrix Midbass

I was very pleased with the results since it was a big inprovement compared to the previos setup. These pictures were taken before the remodeling of our living room. You can find the plans for these horns in the download section.
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To be continued (sometime)…