Hi, a gain of 200!!!. you are asking too much, try a gain of 20.
If the output of the recorder is producing speaker level audio, you do not need a gain of 200. This will put LM386 possibly into self oscillation.
Definitely run the LM386 from 12V, just amplifying with a 5V is of no gain. The output would cutoff with very little input from your recorder.
So try 20 or lower gain.
Tom.... 