其二就是功能，目前的机箱一般都具备前置USB和前置音频插口。

The second is the function that the current chassis generally have front USB and front audio jack .

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通过输入插口与C系列压缩器连结，可以得到美妙的前端音频信号。

Use its insert points along with a C Class Compressor for a direct path to a gorgeous front end sound .

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