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  2. Rocky Mount Instruments - Wikipedia

    en.wikipedia.org/wiki/Rocky_Mount_Instruments

    The Model 400 was a console version of the 300, which was intended for the home and club market and included a self-contained speaker system. The 400A (1970) used the same internals as the 300B, adding a 50 watt amplifier. The 468 (1972) was based on the 368. [10] The 600 series combined the sounds of the Electra-piano and the Rock-Si-Chord.

  3. Western Electric (tube manufacturer) - Wikipedia

    en.wikipedia.org/wiki/Western_Electric_(tube...

    In 2022, Western Electric began production of the 91E amplifier system, employing the 300B tube in a single ended configuration. The amplifier is a high-end model designed for audiophiles, costing $15,000 or more. It can produce from 14 to 20 watts (at 8 ohms) per channel. This is considerably more than the standard 10w per channel from a ...

  4. 300B - Wikipedia

    en.wikipedia.org/wiki/300B

    In electronics, the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. It measures 6.4 in (16 cm) high and 2.4 in (6.1 cm) wide, and the anode can dissipate 40 watts thermal.

  5. Krell Industries - Wikipedia

    en.wikipedia.org/wiki/Krell_Industries

    Krell Industries Inc., founded by its C.E.O. and chief designer Dan D'Agostino, is one of America's largest manufacturers of high-end audio systems. While most of their acclaim has come from their power amplifiers and CD players (their flagship model being the Master Reference Amplifier with a price of roughly $100,000), they also make preamplifiers, loudspeakers, subwoofers, and Super Audio ...

  6. Single-ended triode - Wikipedia

    en.wikipedia.org/wiki/Single-ended_triode

    A SET tube audio amplifier. A single-ended triode (SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a push-pull amplifier which uses a pair of devices with antiphase inputs to generate an output with the wanted signals added and the distortion components subtracted.

  7. Acoustic Research - Wikipedia

    en.wikipedia.org/wiki/Acoustic_Research

    Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX.Acoustic Research was known for the AR-3 series of speaker systems, which used the 12 in (300 mm) acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency drivers.