You can, indeed have a true class a amplifier that operates in push-pull mode.

您可以，确实有一个真正的A级放大器，工作在推挽模式。

youdao

The true class a amplifier will have no crossover distortion, while the class AB amplifier will.

真正的A级放大器，也没有交越失真，而AB类放大器将。

youdao

Also, the efficiency will be greater than is theoretically possible with a class a amplifier at these levels.

此外，效率将大于理论上是可能的A类放大器在这些级别。

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And for people who use their voices a lot, like singers or professional speakers, get voice training and use an amplifier.

VOA: special.2009.09.02

You also get a small digital amplifier with a stereo headphone jack.

CNN: Up close and personal with the Mac G4 Cube

Other new features include a new digital amplifier, a Bluetooth remote, and a settings memory to remember your source, volume and EQ levels for next time.

ENGADGET

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