功放在某种形式上来说是一台能量转换器，通过它把弱的音频电流转换成强的音频电流，所以注重电源的投资尤为重要。笔者认为视自己的财力和机箱的大小为前提，火牛的容量能大则大，最小也应该是音频输出功率的两倍以上。如果是自绕的，线径能大则大；如果是购买的也要注意一下? An amplifier is, in some ways, an energy converter that converts a weak audio current into a strong audio current, so focusing on power investments is especially important. The author believes that depending on their financial resources and the size of the chassis as a prerequisite, the capacity of the fire cow can be large, the minimum should be more than twice the audio output power. If it is self-winding, the diameter can be large and large; if it is purchased must pay attention to what?