请教下，耳机放大器接地的问题

victoryy · 发表于 2009-4-18 17:50:02

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stax 006T放大器尾部有个接地端子，从来没使用过，查了下论坛也没人讨论过，所以发贴询问有没有必要用，该怎么用呢？知道的朋友指点下，谢谢啦！

老古董 · 发表于 2009-4-18 23:54:19

我是搞电信的，顺便回答一下。。。

设备接地主要是防雷；耳放接地，估计是把一些金属外壳一些干扰都导入地下，以便设备更好地工作，提供不受影响的放大。

Graham Slee 对SOLO的GREEN和PSU1有个介绍，可以参考：
http://www.audiocontrol.co.uk/graham_slee/solomc.htm

Which power supply?
The lowest cost or entry option is the Solo SRG/Green supplied with its energy saving switched mode (SM-PS) plug-top power supply. SM-PS have more leakage than linear power supplies which means you may have to use a supplementary earth wire: because the Solo SRG case is metal some people can feel a slight vibration sensation when a hand is drawn across it - although this is approved as being safe it can cause annoyance to some. This slight case vibration can also subtly modulate the sound in some circumstances, so in a similar way to grounding a turntable, we provide the Solo SRG (now fitted on both options) with a rear-panel grounding post from which can be run an unobtrusive "earth" wire to another earthed system component, an earth spike, or the earth pin of a mains plug (CAUTION: Wiring to the wrong pin can cause electrocution! as well as considerable damage). Although the SM-PS saves over 80% of idling power making it a contributor to world energy conservation, the above experimentation will be required to get the best out of your Solo SRG/Green headphone amplifier. The alternative is to use our PSU1 powered option, which although being more expensive also offers a subtle improvement in information retrieval making it the more musical proposition in a high resolution system.

老古董 · 发表于 2009-4-18 23:59:06

接地方法：

专业电信接地是采用铜排深埋入地下，设备再通过PGND连接到铜排；
一般来说，每个大楼都有一个接地系统。我们普通接地，可采用6mm2的接地线，从耳放的接地端子，连接到大楼的接地系统中。如果大楼或机房没有专门的接地铜排，变通的方法是连接到窗户或其它和大楼相连并有金属接触面的地方，固定即可。