Henry Kloss (February 21, 1929 – January 31, 2002) was a prominent American audio engineer and entrepreneur who helped advance high fidelity loudspeaker and radio receiver technology beginning in the 1950s. Kloss (pronounced with a long o, like "close"
Acoustic Research
Kloss co-founded Acoustic Research, Inc. (AR) with Edgar Villchur in the summer of 1954. Villchur, a former teacher of Kloss, had designed what he called the "acoustic suspension" loudspeaker, an elegant solution to the problem of bass harmonic distortion. Villchur had written and was awarded a patent for the acoustic-suspension loudspeaker system [US Patent No. 2,775,309, December 15, 1956], and had built a prototype of the design at his home in Woodstock, New York. Villchur had tried to sell the patent to both Altec Lansing and Bozak, manufacturers of large speakers at the time, but neither company was interested. Altec told Villchur, "if something like what you describe was possible, our engineers would have already discovered it".
After class one afternoon in the spring of 1954, Villchur and Kloss rode from New York City to Woodstock in Villchur's 1938 Buick, to allow Kloss to hear the prototype. After this, they jointly decided to manufacture the new speaker design which became known as the "AR-1", the first commercial acoustic-suspension loudspeaker system. Villchur was 100% responsible for the design and patent of the system; Kloss was responsible for perhaps 75% of the mechanical design of the speaker cabinet and system.
KLH (KLH Research and Development Corporation)
thumb|The KLH Model Eight FM table radio featured a precision [[planetary gear|planetary-geared knob for tuning, excellent sound quality, and a minimalist design.]]
Kloss began his custom of eponymous products by lending his last name's initial to KLH as a founder in 1957, along with Malcolm Low and J. Anton Hofmann (son of pianist Józef Hofmann), who had also been investors in AR. At Cambridge-based KLH, Kloss continued to build speakers such as the classic KLH Model Five and Six, and produced one of the first small FM radios with high selectivity, the Model Eight. The KLH Nine was the world's first full range (flat from 40 Hz - 20 kHz) electrostatic loudspeaker (1960). The tweeter was mounted near the middle, with ten woofer panels occupying the remaining area. Prototypes were completed at JansZen Laboratory and put into field tests starting in 1957, and once perfected, the speakers were put into production at KLH.
Though KLH was sold to the Singer Corporation in 1964, Kloss remained at the firm for a short time to assist in the development of additional speakers and electronic music products, and the firm continued to attract design and engineering talent. In 1967, he collaborated with Ray Dolby of Dolby Laboratories to develop the lower-cost "B" version of the Dolby noise reduction system to reduce tape hiss. This resulted in the KLH Model Forty reel-to-reel tape recorder, the first appearance of Dolby technology in the consumer product market.
By 1967, Kloss had left KLH; it was eventually sold to the Japanese firm Kyocera, and production was shifted overseas. By 1979, nearly all of the original design and engineering team had left the company.
Advent Corporation
right|thumb|An early stand-alone Advent Dolby noise reduction unit, for tape playback use only. Later models also supported recording on tape.
Kloss founded Advent Corporation in 1967. Around 1968, Kloss had quit KLH to develop a low-cost projection television, but had trouble financing the leading-edge research and development that was still required. To earn some money, he decided to build a high-performance, low-cost, dual-driver speaker system, "The Advent Loudspeaker". The new tape recorder had a plain, prosaic appearance that downplayed its revolutionary design and capabilities. A later incrementally-improved model, the Advent 201A, featured new Sendust tape heads which were more resistant than standard permalloy heads to abrasion from high-performance chromium dioxide coated tapes.
In 1972, the Advent VideoBeam 1000 was finally released, the first large screen projection color television for home use.
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Kloss Video Corporation
In 1977, Kloss founded Kloss Video Corporation (KVC) as a spin-off company. He invented the Novatron tube there, which increased the efficiency of projection TVs. Having pioneered large-screen video projection systems, Kloss found himself undercut by lower-cost models from Japan, and he eventually shut down his company.
Design and marketing philosophy
Very early in his career, Kloss decided to concentrate on designing audiovisual equipment which combined high quality, often with leading-edge consumer technology, with moderate pricing.