The effects of Karlson's reflective system were mentioned in reports from its demonstation at the fall 1954 Hi Fi show K12 introduction and illustrated in the early Karlson "12" brochure as "Aural Optics". (Bose and others referenced the patent)
A "generally cubical"cabinet ("Fig.1") was used in the patent and simplified in construction with its backwave passing over a gap between its slanted baffle and cabinet top. That gap may have been 2 inches high.
Anyhow, in such a structure I think the tight end of the aperture is setting system resonance and that Karlson probably would have not tuned this cubical "K12" higher than 70Hz.
Can it be guesstimated in hornresp and assuming "so", what model would suit?
(wonder how is "sounded"? - it might be a fun bujld)
A "generally cubical"cabinet ("Fig.1") was used in the patent and simplified in construction with its backwave passing over a gap between its slanted baffle and cabinet top. That gap may have been 2 inches high.
Anyhow, in such a structure I think the tight end of the aperture is setting system resonance and that Karlson probably would have not tuned this cubical "K12" higher than 70Hz.
Can it be guesstimated in hornresp and assuming "so", what model would suit?
(wonder how is "sounded"? - it might be a fun bujld)
Attachments
Hmm, ignoring the K-slot, it would be a single fold 'pinched' at the fold, so would be a parabolic bi-fold that in HR looks like two 'V' sections closed at one end = |><
