http://www.simaudio.com/faq.htm#q12
What's the difference between the "reset/standby button" and the "On/Off power switch" ?
The "On/Off power switch" controls the AC main feed and should be left on at all times. The "reset button" is a "soft" power up switch and is the actual mechanism for powering up your amplifier.
开关设计在背后,就是因为不需要经常关机.