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2. Soundcraftsmen - Wikipedia

   en.wikipedia.org/wiki/Soundcraftsmen

   Soundcraftsmen was a manufacturer of high-end audio stereo components located in Santa Ana, California, United States.. The company was founded in 1961 by Ralph Yeomans, a concessionaire in Fedco (a discount membership store chain in southern California, until the chain closed in 1999).

3. Yorkville Sound - Wikipedia

   en.wikipedia.org/wiki/Yorkville_Sound

   In 1983, Yorkville Sound created their own "Sound Crew" line of concert speakers. In 1985, two new product lines appeared with the introduction of the "élite" series of portable loudspeakers with non-user adjustable 'black box' processing and the "Audiopro" line of electronic amplifiers. A thousand-watt subwoofer was brought out in 1986: the ...

4. Valve Amplification Company - Wikipedia

   en.wikipedia.org/wiki/Valve_Amplification_Company

   VAC was founded in 1990 by Kevin Hayes and his father, Channing W. Hayes in Sarasota, Florida. The first products were the PA45 and PA90 power amplifiers, designed jointly. Beginning with their second product, the CPA1 / CLA1 preamplifier, designs are largely the work of Kevin Hayes, who functions as chief engineer.

5. Audio power amplifier - Wikipedia

   en.wikipedia.org/wiki/Audio_power_amplifier

   Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.

6. Kenwood Corporation - Wikipedia

   en.wikipedia.org/wiki/Kenwood_Corporation

   Kenwood's series of "Integrated Amplifier" stereo power amplifiers, launched in 1977 and produced through the mid-1980s. The design for most of these products featured a true dual-mono path for stereo output (where no electrical components are shared between left- and right-channel amplification).

7. Crown International - Wikipedia

   en.wikipedia.org/wiki/Crown_International

   The Crown DC300, introduced in 1967, helped define the era of modern power amplifiers [5] In 1959, Crown began making standalone tube power amplifiers. By 1963, solid state electronics development allowed Crown to produce a more robust tape recorder, and in 1964, their first solid state power amplifier: the low-profile SA 20-20. [2]

8. Bob Carver - Wikipedia

   en.wikipedia.org/wiki/Bob_Carver

   Carver's U.S. patent 4,218,660, first applied in his model M400 power amplifier, describes a power supply whose input switches on and off at an ultrasonic rate to adapt to the varying power demand of the amplifier. The innovation is in the power supply, not the amplification circuitry, and in the use of switching, not in the use of a coil or coils.

9. Power amplifier classes - Wikipedia

   en.wikipedia.org/wiki/Power_amplifier_classes

   In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier 's characteristics and performance. The first three classes are related to the time period that the active amplifier device is passing current, expressed as a fraction of the period of a ...