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A Speaker that Kicks Butt in Large Spaces
A Speaker that Kicks Butt in Large Spaces
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Old 18th June 2019, 06:15 PM   #1261
freddi is offline freddi  United States
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A Speaker that Kicks Butt in Large Spaces
Default The "X" Factor (use of a K-tube tweeter)

a little K-tube the size of the old Transylvania Power company makes a good tweeter or helper tweeter.

Karlson's X15 speaker was introduced in 1965 and first had a mini - "klam" driven by a 3 inch fullrange speaker. The next model had a pipe with parabolic slot.

Some of the Karlsonators, and certainly Karlson's K12 would easily adapt to an internally mounted K-tube, so an "X12" (augmented with capable subwoofer) could make an ideal small and punchy substitute for a horn system

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Old 6th July 2019, 10:30 PM   #1262
freddi is offline freddi  United States
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A Speaker that Kicks Butt in Large Spaces
has anyone here worked recently with the Karlson klam projector? - Sometimes they are fun. It would be a good idea to have removable aperture "wings" so selection of aperture could be made for best overall sound.

Some damping material may be needed. My klam15 sounds fine with a hard front chamber bur a copy of the Weiss Rocket, has significant reflections and stuff bouncing & splattering around in its front chamber.

Here's a drawing from Tiggersound. I wonder what the inner set of aperures is supposed to accomplish - ?

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Old 6th July 2019, 11:32 PM   #1263
xrk971 is online now xrk971  United States
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A Speaker that Kicks Butt in Large Spaces
A few years ago I made a Klam for a TC9FD and it sounded terrible - like a tunnel. Maybe not meant for smaller drivers?
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Old 7th July 2019, 12:54 AM   #1264
freddi is offline freddi  United States
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A Speaker that Kicks Butt in Large Spaces
seems like my 15" klam is listenable up close with no damping material its front. A klam 10 with botched (too tight) aperture has a lot of reflection problems - but sounds pretty good as long as one is back say 6 foot or more. I think with a more open aperture, a 10" klam might be pretty good. Whether they do what K said = ? Their vertical pattern seems good and if one were overhead , could sound pretty good sitting right under it.

I spoke only once to Jess Oliver on the phone. He said that neither he nor Karlson were good salesmen.

The rear of AP100/Magna Clam tapers to a height of only 15.5" external - so the driver would be tilted to get it
into the cabinet.

I'm tempted to have Jesse build another klam10 as my klam12 is too heavy to lift with atrophy and hernia.


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Magna Clam / AP100 was basically an upscaled Karlson APX Asymmetric Projector / Oliver Phase IIII Projector

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Carl said the little AP9C celing speaker was very good

and the AP100 (also sold as Jess Oliver's "Magna Clam") really stuffed an Altec 421 into a small back chamber. They were instaled at Radio City Music Hall back in the day. There was a K-tube in the front chamber and resistive vent between the front and back chamber.


AP9C was made of stamped steel with some curve to its cavity per the final installment of Karlson's "Acoustic Transducers"

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my previous builder went by wing radius given by Carl Neuser but the pivot reference must not have been right
so the aperture came out "tight". I'd love to open it up but am afraid it will look bad if I try with a jigsaw.

Maybe I could cut it with a little circuilar saw to approximate that Tiggersound sketch aperture -?

The old pleated surround Beta10cx was pretty strong in this thing .

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Old 14th July 2019, 05:19 AM   #1265
freddi is offline freddi  United States
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- what do you folks think of using a curved panel/ "reflector" per Fig.6. of Karlson's final speaker patent?


how would you position the reflector in the sketch below? Would you make the cabinet bit higher "this" ?

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