Power amplifier is used in many fields, such as sound amplifier and electric vibration generator.

功率放大器在很多领域都得到了应用，比如音响、电动振动试验台等等。

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What the senior engineer knew was the connection between two sound components — such as receiver, mixer, amplifier, and speakers — went beyond two copper wires and some insulation.

这位资深工程师所知道的就是两个音响部件之间的连接，两段铜线和一些绝缘介质之间的接收器、混音器、放大器和扬声器。

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Sound headphone also requires a quality amplifier just like a top - grade loudspeaker.

靓声的耳机就如同高级的喇叭，同样需要高素质的放大器来伺候。

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Samsung's Vacuum Tube Soundbar (model HW-F750) resolves consumers' desire for pure power and warm, natural sound by integrating a vacuum tube amplifier into a soundbar for the first time.

ENGADGET: Samsung introduces its CES audio hardware, claims a world first

That old piano is a big part of the appeal: Its tinny sound is run through a 1950s amplifier, adding layers of fuzz and grit, so it's as if you're listening to a very old recording of a very new song.

NPR: Marco Benevento: Reinventing Amy Winehouse

Samsung's 7.1 Channel Home Theater System (model HT-F9750W) was created to be the perfect counterpart for Samsung's 2013 TVs, with a Gallium Nitride (GaN) amplifier that delivers pure sound, and design and usability features that bring home a totally seamless experience.

ENGADGET: Samsung introduces its CES audio hardware, claims a world first