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  2. McIntosh MC-2300 - Wikipedia

    en.wikipedia.org/wiki/McIntosh_MC-2300

    Design. Physically, the MC-2300 is a very large and sturdy amplifier, measuring 10.5 in (26.7 cm) high x 19 in (48.3 cm) wide x 17 in (43.2 cm) deep, and weighing an impressive 128 lbs (58 kg). During its production run, 4545 units were made. [2] Today, the MC-2300 remains a very sought-after amplifier for audiophiles and collectors.

  3. Marshall JCM800 - Wikipedia

    en.wikipedia.org/wiki/Marshall_JCM800

    The amplifier was equipped with EL34 valves (tubes) for amps sold in the UK and 6550 tubes for amps exported to the United States. [3] The JCM800 is considered a "hot" amplifier because it has more gain stages than comparable amplifiers. There is a difference between the early 2203/2204 and the later dual channel models 2205/2210 models.

  4. Amplifier - Wikipedia

    en.wikipedia.org/wiki/Amplifier

    Amplifier. A McIntosh stereo audio amplifier with output power of 50 watts per channel used in home component audio systems in the 1970s. [1] Amplification means increasing the amplitude (voltage or current) of a time-varying signal by a given factor, as shown here. The graph shows the input (blue) and output voltage (red) of an ideal linear ...

  5. NAD 3020 - Wikipedia

    en.wikipedia.org/wiki/NAD_3020

    It was the first integrated amplifier built with convincing ability to drive difficult loudspeaker loads, and a sound quality that far exceeded other integrated amplifiers at its price point for the time. [2] In an era when the NAD's rated power output of 20 watts per channel continuous into 8 ohms was considered anaemic, [3] the manufacturer ...

  6. Threshold Audio - Wikipedia

    en.wikipedia.org/wiki/Threshold_Audio

    Threshold Audio. Threshold Audio is a high-end audio equipment manufacturer originally established in California in 1974 by audio engineer Nelson Pass and graphic designer René Besne. The company, today based in Houston Texas, manufactures mono-block and stereo power amplifiers, multi-channel power amplifiers and stereo control amplifiers.

  7. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/Power_amplifier_classes

    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 ...