KLH Model Six (1958–1972)
A two-way acoustic suspension loudspeaker system designed by Henry Kloss, produced for 14 years.
Overview
The KLH Model Six is a two-way loudspeaker system from KLH, which Henry Kloss founded in 1957. Kloss designed it himself, and it was produced from 1958 to 1972. It is recognized as one of the company's landmark speakers of that era. It is an acoustic suspension design with a newly developed small cone-type tweeter. People noted its fidelity, its bass performance and its simple crossover. Cambridge SoundWorks later named its own Model Six after it.
Specifications
| Impedance | 8 ohm |
| Speaker type | two-way |
| Power handling | RMS – 12 W, Max RMS – 150 W |
| Dimensions | H – 24", W – 13", D – 12 5/8" |
| Weight | 42 lbs ea |
Design
The Model Six uses an acoustic suspension enclosure with an inverted surround woofer. The tweeter is a newly developed small cone type. The crossover is simple: an oil-filled capacitor and a few resistors. Some units have an epoxied woofer. Restored examples have rebuilt crossovers, along with new finish and grill cloth.
Context
The Model Six was described as one of the company's landmark products after its founding in 1957. Production ran 14 years, from 1958 to 1972. Cambridge SoundWorks later named its own Model Six in recognition of Kloss's original design.
Market
Used pairs of KLH Model Six speakers have sold for between $150 and $325 in recent years, and one pair was listed at $300 a decade ago. Replacement grill cloth is available for $74.99. Failed tweeters are a common problem. Some early models have epoxied woofers that may need servicing.
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