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Lowther units, Oris horn and K-horn bass


Nickal

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Has anyone used the Oris 150 tractrix horn with a Lowther drive-unit to cover midrange upwards, coupled to a k-horn bass unit?

Such a combination would use a single drive unit for ~200Hz - 22kHz and probably require a simple x-over. It may therefore offer a worthwhile improvement in sound and may not be too far removed from the changes proposed by Paul Klipsch in the revised (but since abandoned) new k-horn.

See www.lowther.nl

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Ray,

From what I understand, a new k-horn design was (almost?) finalised which used a single tractrix horn unit to operate from about 800Hz upwards and a bass unit, slightly larger than the current khorn unit, would cover the lower range but would use 2 smaller drive units to extend the upper operating range to the higher than present bass x-over point.

I do not know why this new version was not manufactured, but cost and potential market size may have forced its demise.

The important element was the elimination of separate mid and treble units and the corresponding x-over components.

Most correspondence about khorn upgrades relates to retaining 3 drive units and simply using better quality horns, or different x-overs eg ALK design. The beauty of the Oris horn with a khorn bass (if it is compatible), is that the there are now only 2 drivers and minimal or no formal x-over - and as Randy states - it may be possible to rely on the natural roll-off of at least one, if not both, horns.

If, like me, you like OTL (or single-ended) valve amplifiers such a simple speaker design could offer a 'better' frequency range compared to Lowther type single drive-unit speakers, and a genuine improvement over the current khorn.

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Nickal,

Most recent posts from BobG (moderator) and PhilH (moderator) indicated that the Jubilee (new verion of two way KHorn design) is still in the works, that Paul Klipsch is involved in the design, that it's taking a lot longer to perfect it than anybody wanted or anticipated, but that the project is still very much alive.

Klipschites? Anybody out there? Still working on it? confused.gif

Ray Garrison

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Thanks for the information on the Jubilee (I could not remember its name).

However, the Oris horn and Lowther unit are available now and would be a lot less expensive as an upgrade compared to replacing the khorns completely - at least in England.

I would really like to know if someone has tried the combination suggested, how they 'married' the two units, and if it was worth the effort.

Nick

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