How many audio clip arrays are supported?

Just out of curiosity, does anyone know how many audio clip arrays Unity can support in a scene?

Since it is not explicitly stated anywhere in the docs, you are to assume that the limit is the amount of memory your application can use. The question is, of course, if your CPU can handle that much, since audio is more CPU intensive than memory intensive when running. Inactive or not playing you are only gated by memory (I believe a kB or a few per audio source).