My system consists of Bryston 3B, Cambridge Audio A300 In. Amp, I turned off the 3B once a month, just give it a break for a long period of time being working. Everytime I turned the whole system off, I experienced the popping sound so lound for 2 and 3 times, It happened for both side of speakers. Otherday, I read the post, they claimed "because of power source, the current your equippments draw is unproteced, and also It possibility that U're sharing the power supply between deffective equipment, or overloaded equipment with your component. And I am going to upgrade the huge surge protection to see what happened, I'll have U informed. good luck
