CROSSOVER是滤波器，那就要用到HIGH LEVEL INPUT（高电平输入）方式，可以看做为左右平衡、你说对了。3、2和3点经过低音炮的低通滤波器滤除中高音。
基于8个网页-相关网页
High Level Input Voltage 输入高电平电压
HIGH Level Input Current 输入高电平电流
high-level input 高电平输入
Input High Level 输入高电平
Input Current High Level 输入电流
high level input
高电平输入
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In part he believes that the problem is economic institutions: regulatory barriers to entrepreneurship, a financial system that favours insiders, and a high level of input from labour, which tends to be biased towards the status quo.
ECONOMIST: Why can't Europe's economies catch up with America?
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