Pioneer introduced the SPEC-4 power amplifier in 1977.

先锋推出了规格- 4于1977年功率放大器。

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This paper will introduce the design of power amplifier in detail.

本文详细介绍了功率放大器的设计。

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The 2W linear RF Power Amplifier in this paper is designed in Feedback method, based on Loadline Theory.

所设计的射频2W线性功率放大器是基于负载线匹配原理，采用功率回退法技术。

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"Last year,one of our staff members actually brought his own guitar and amplifier and led us in several rounds of song, Christmas songs and holiday songs.

VOA: special.2010.12.20

For instance, a German physicist named Robert Wichard Pohl made a solid-state amplifier in 1938 using salt as the semiconductor.

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"In 1962 Jim Marshall developed the first Marshall amplifier in his shop in Hanwell, London, England after taking time to listen to what guitar players wanted and needed, " says Managing Director of Marshall Amplification, Jonathan Ellery.

ENGADGET: Marshall's Hanwell HiFi speaker is bred from guitar amps, at-home with your PMP (update)

But, it will at least sound good, with a 25 watt amplifier built in for those who want to go analog, perfect for those Triad speakers.

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