With this much headroom, it is unlikely that the 5500 can be driven to distortion unless perhaps another APIunit is driving the input!
有了这么多的空间，这是不可能的5500可以驱动的失真，除非也许另一个API单位是推动输入！
2
Sometimes applications are written with a fine-grained API layer, requiring the client to make multiple calls to the API layer for a single logical unit of work (LUW).
One of this transaction strategy's restrictions is that the client-layer (or presentation-layer) classes can make only a single call to the API layer for any given transactional unit of work.