In the early 1930s, most theater owners installed new sound systems.

在20世纪30年代初，大多数影院都安装了新的音响系统。

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The solution, many now believe, is to fit electric and hybrid cars with external sound systems.

许多人认为，想要解决这个问题，就给电动和混合型汽车安装上外部声音系统。

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And many drivers simply value perks such as alloy wheels and sound systems over unseen crumple zones.

NPR: AP IMPACT: Cars Made In Brazil Are Deadly

Samsung today also entered a new category in home audio with its first-ever 2.2 channel Giga Sound Systems.

ENGADGET: Samsung, Flo Rida introduce massive Giga Sound MX-FS9000 speakers (update: hands-on video)

Their sound quality is comparable to surround sound systems that are much larger, more complicated and more expensive.

ENGADGET: ZVOX intros three new Z-Base models, lowers the pricing soundbar