If stereo set system contain voice feedback , then a failure for immediately take effecting , the have noing any reason can forgive this point . this is a kind of design failure , but not is a failure for piece . even compare to cause the to call low have to many of voice feedback , also can make the room become more orotund responses , from but make the demand s volume ratio originally design of want big 音响系统如果有声音回馈，则是一个即时见效的失败，没有任何理由可以原谅这一点。这是一种设计失败，而不是元件的失败。即使是比引起鸣叫低得多的声音回馈，也会使房间变得更多的声音回响，从而使需要的音量比原来设计的要大。
