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    • Home
    • Mid-Horns
    • K53k Adapter!
    • Tweeters
    • Gallery
    • Why Symmetric Tractrix
    • ALK Engineering
    • Links
    • Testimonials
    • Contact & Ordering
    • Whats New
  • Home
  • Mid-Horns
  • K53k Adapter!
  • Tweeters
  • Gallery
  • Why Symmetric Tractrix
  • ALK Engineering
  • Links
  • Testimonials
  • Contact & Ordering
  • Whats New

Mid - Horns.

Fastrac-402 W/1 inch throat ext: For use with K55

Drop in replacement horn for Lascala and KHorn.

Fc 317Hz

$650 per pair plus shipping. 


Fastrac-402 For use with 2 inch drivers

Drop in replacement horn for Lascala and KHorn.

Fc 317Hz

$600 per pair plus shipping. 

Fastrac-501 For use with k55

Fastrac-501 For use with k55

Drop in replacement horn for Klipsch Belle.

$350 per pair plus shipping.

Eliptrac-400

Fastrac-501 For use with k55

Eliptrac 400 Fc 300 Hz.

$500 per pair plug shipping.

used in DIY applications comes with cutting template. Works great for Cornscala builds, can also be used in Klipchorns and Belles with custom grills. 

Fastrac-601 Ready to go. A drop in replacement horn for Cornwall speakers. $350 pair plus shipping.

Fastrac-701 Ready to go. $300 per pair plus shipping.

The original K700 horn has been tough to beat. The small mouth area makes pure tractrix designs beyond difficult. I had to come up with a Hybrid Tractrix flair that would allow for the cutoff I need while maintaining the smooth Tractrix sound. 


On that note, any rectangular Tractrix design is a hybrid, because pure Tractrix designs are round.


Fortunately our symmetric Tractrix design is forgiving enough to allow morphing  the small mouth into a usable component.



Mid - Horns -2

Fastrac 601-II for Cornwall II

Includes adapter for K52 drivers

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Includes adapter for K52 drivers

Includes adapter for K52 drivers

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FT601-II FR

The First set of these is being shipped for test fitting, I  should know soon if any revisions are necessary.


Eliptrac-240

Eliptrac Fc 240Hz.

$800 per pair plug shipping.

used in DIY applications comes with cutting template. Works great for Cornscala builds, can also be used in Klipchorns and Belles with custom grills. 

FT 701-II installed in a HII

I used a drememl to remove about 1/16 material from the top and bottom of the horn opening. I don't want to make the horn thinner and cabinet has plenty of room to work with.

Fastrac-701-II Rerquires sanding!

The original K700 and K701 horn has been tough to beat. The small mouth area makes pure tractrix designs beyond difficult. I had to come up with a Hybrid Tractrix flair that would allow for the cutoff I need while maintaining the smooth Tractrix sound. 


Fortunately  The FT-701 is good to go and just a few more mods should have this Horn ready for your Heresy 2 or Super Heresy 2




New 2" Elliptical top mount horn.

Fastrac-701

Eliptrac HF-II Good to go! Large drop in replacement Klipsch Tweeter.

Horn Specs Fastrac 501 - K500 replacement.

Fastrac 401 - 402 specs - K400 replacement.

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  • Sovol Unicorn mod.
  • Super Heresy WIP
  • Cutting template

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