D类后级三问：电源输出端并联电容、软启动、喇叭保护

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买了块氮化镓后级功放板EPC9192KIT，在给它配电源。去官方论坛问了下，厂家推荐Hypex或明纬meanwell lrs-n2系列。

问题1电源输出端并联电容。如果我电源功率足够大，是否就不需要再并联个电容？如果一定要接电容，那么是否越大越好？用超级电容怎么样？手头上正好有两颗；如果不需要接，那么电源功率得相对于功放板额定功率的几倍？附厂家快速参考手册里面的要求：The onboard bulk capacitance is 600 F for each rail. Some power supply might not be able to regulate the voltage when delivering low frequency output, due to the ripple current. Please monitor the supply rails with a scope to ensure it is stable during operation. It is a good practice to add external bulk capacitors (i.e. 3300 F per rail).

问题2软启动板。是否只有用磁芯变压器供电时才需要软启动板？用开关电源我保证前后级板子的上电时序即可？提这个问题是因为在Hypex软启动模块手册里面看到这么一句：Please note that this module is not recommended for new designs, since toroidal transformer based power supplies are no longer in our portfolio.说它这个软启动模块不建议给新（开关）电源用，因为他们已经不搞环牛了。

问题3喇叭保护电路。EPC9192KIT开发板的电路图里面没有喇叭保护功能，那么如果我用时序电源模块来保证前后级放大及辅助电源的上下电时序，是否还有必要再加个喇叭保护模块？附EPC9192KIT快速参考手册中对电源时序的要求：Power supply sequencing is not important, but the safest is to turn on first the 12 V housekeeping supply, and then the dual power supply for the high voltage rails. For turn off, use opposite sequence.

注：EPC开发板所有资料都开放，下载也无需注册，就喜欢这样的。不像英飞凌那样要个原理图还得签NDA。EPC9192KIT开发板网址：https://epc-co.com/epc/products/evaluation-boards/epc9192