The crisp-sounding $349 Audioengine speakers don't require a stereo receiver.

音质明快的Audioengine音箱（价格349美元）不需要立体声接收器。

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A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear.

耳机一种传递电子信号的设备，比如从电话、立体声或广播接收器上传出可听的声音。这种设备嵌到耳朵上或耳朵里。

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Features - search, repeat, random or shuffle play-back, FM receiver, format compatibility, ability to feed songs through a home stereo, and direct recording capability are some features to consider.

特色搜索，重复，随机洗牌或游戏背部调频接收机、格式兼容性、通过能力养活家立体声歌曲，有能力直接录制一些特点考虑。

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Their system is capable of broadcasting from a stereo receiver, or even a portable device, to headphones or speakers.

ENGADGET: A First Step Towards Bluetooth Stereo Headphones

Harman Kardon, which introduced the world's first stereo receiver in 1958, is synonymous with beautiful sound and attractive design.

ENGADGET: Harman Kardon trots out five iPhone-matching headsets, keeps you in high Apple fashion

Now, using the Pure i-20, and its built-in DAC, recordings sound just as good as CDs played on my very respectable NAD C542 compact disk player (my other not-too-new components are a NAD 7100 stereo receiver and Paradigm Studio 20 v. 4 speakers).

FORBES: How to Get True High-End Audio From Your iPhone