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2. McIntosh Laboratory - Wikipedia

   en.wikipedia.org/wiki/McIntosh_Laboratory

   Late 1960s: MC 3500 Tube Power Amplifier, 350 WPC. [27] Early 1970s: MC 2300 Power Amplifier, 300 WPC. Early 1980s: MC 2500 Power Amplifier, 500 WPC Power Guard and similar chassis to MC 2300. Around 1990: MC 2600 Power Amplifier, 600 WPC Power Guard final version on MC 2300 Chassis. Around 1990: MC 7300, 300 WPC and much smaller than MC 2300.

3. McIntosh MC-2300 - Wikipedia

   en.wikipedia.org/wiki/McIntosh_MC-2300

   During the 1970s, the MC-2300 was an expensive piece of audio equipment, with a retail price of $1799 by the time of its discontinuation in 1980. [1] That being said, its outstanding power and sound production quality made it a valued part of many recording studios and although some people prefer the sound of tube amplifiers, the overall greater reliability and freedom from repair of the newer ...

4. Optonica - Wikipedia

   en.wikipedia.org/wiki/Optonica

   Optonica amplifier (SM-3636) and tuner (ST-3636) from 1978. The Optonica brand was created and first launched by Sharp of Japan in 1975 to compete in the high-end audio market along with established brands such as Sansui Electric, Sony, Panasonic, Sanyo, Yamaha, Nakamichi, Onkyo, Fisher Electronics, Technics (brand), Pioneer Corporation, Kenwood Corporation, JVC, Harman Kardon and Marantz.

5. Power amplifier classes - Wikipedia

   en.wikipedia.org/wiki/Power_amplifier_classes

   Power amplifier circuits (output stages) are classified as A, B, AB and C for linear designs—and class D and E for switching designs. The classes are generally based on the proportion of each input cycle (conduction angle) during which an amplifying device passes current. [2]

6. 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.

7. ICEpower - Wikipedia

   en.wikipedia.org/wiki/ICEpower

   In 1994 Karsten Nielsen began to write a Ph.D. dissertation "Audio Power Amplifiers Techniques Based on Efficient Power Conversion" [2] at the Technical University of Denmark as part of a project in collaboration with Bang & Olufsen; his findings were applied in the Beolab 1 active loudspeakers in 1997, and he was awarded a Ph.D. in 1998.