Articles, Scans and photos

John E Karlson,
The Karlson Speaker Enclosure (Scans: p 1 2 3 4 5 6)
In Radio & Television News, January 1954

A New Approach in Loudspeaker Enclosures (Scans: p 1 2 3 4 5 6)
In Audio Engineering, september 1952

Karlson Ultra-Fidelity article (Scans: p 1 2 3 4 5 6 7 8 )

The Karlson acoustic transducer for HI-FI and music (Scans: p 1 2 3 4 5)
In Popular Mechanics, july 1958

Karlson,
The X-15 ad
The Rocket ad

Radio & TV News Ads
1-1954 Cover
3-1954
8-1955
11-1955
6-1956
4-1957
10-1957
2-1959

Karlson ad from 1969 Burnstein-Applebee catalogue

Karlson,
Klam Info (scans p 1 2 3 4)
Port modification sheet (scan)
Kit assembly info (scan)
Flyer (scans 1 2)

Newspaper article
Profile article about John Karlson (scan)
Article about Jet Nozzle (scan)

Bob Ledbetter 15 in. brace modification (scans p1 2 3)
Bob's autograph on a pricelist (scan)

Wayne Green (Karlson)
Sales article/advertisement (scan)

Ernst Georg Beck,
Der K-Kopler (German) (English translation)

Matt Hennessy,
Enclosure types

LEECH,
'Sound Laser' advertisement (scan 12 3 4)

Martin C. Poppe,
The K-Coupler, A New Acoustical-Impedance Transformer (Scans: p 1 2 3 4 5) (PDF)
In IEEE Transactions on Audio and Electroacoustics, december 1966

Raymond H. Bates,
A Tuned-Pipe Enclosure for Bass Enhancement (Scans: p 1 2 3)
In Audio, may 1955

Norman C Fulmer,
A Corner Labyrinth Transducer (Scans: p 1 2 3 4)
In Radio & Television News

Paul Klipsch,
Frequency measurement of 'Polyresonant 4-cavity box' (scan)

Some info on resonant air couplers and Karlson enclosure origin

Karlson galleria
Fred Ireson's Karlson projects photos
David Ortega's Karlson Dipole project photos
Al Stemen sent these pics of his X-15's