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In 1948, the original four-stage circuit was replaced with a three-stage design that was designated the TL/12. This amplifier had the same high performance at reduced cost, and it was responsible for establishing and securing the future of the company as a dominant player in the "hi-fi" boom of the
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was 0.1% at rated output. This represented a major leap forward in accepted standards for high-performance amplifiers (with 2% distortion generally considered acceptable at the time). This first "Point One" amplifier was known as the Type 15, and produced 15 watts output, at 0.1% distortion, using
244:" connection of the output stage to obtain higher power output with triode-like characteristics. These amplifiers included the TL/10, TL/25, TL/12-Plus, TL/25-Plus, TL/50-Plus, and the Stereo 20, Stereo 50 and Stereo 60.
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and theatres, with only a few staff. Typical designs used were similar to those found in the
Partridge Public Address Manuals of the time, which used Osram's DA30 power triodes in push-pull for 45 watts output.
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132:. The company was founded in 1934 by Harold Joseph Leak and was sold to the Rank Organisation in January 1969. During the 1950s and 1960s, the company produced high-quality
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Subsequent amplifiers from the company all used the same circuit topology as the TL/12, but took advantage of newer more efficient power valves and the so-called "
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of EMI, but it was slow to emerge as popular method for controlling amplifier performance.
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is the brand name for high-fidelity audio equipment made by H. J. Leak & Co. Ltd, of
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applied over four stages. The amplifier has a similar topology to the
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to achieve very high performance. This approach had been patented by
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The company initially focussed on provision of amplifiers for
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Audio equipment manufacturers of the United
Kingdom
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279:but its sources remain unclear because it lacks
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188:in 1934, and already used before that by
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362:(in German). Archived from
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294:more precise citations.
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166:public address systems
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18:Leak (disambiguation)
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267:list of references
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213:, with 26 dB
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364:the original
360:Hi-Fi Studio
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292:introducing
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160:Early days
134:amplifiers
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225:in 1947.
196:Point One
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103:June 2009
215:feedback
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