lm386 speech amplification and filter circuit

I am using lm386 for signal amplification recievied from microphone and then send them to analog pin of arduino…do i need a speech filter circuit also between lm386 and arduino or lm386 would limit the frequency response to 300-3400hz (the speech audio spectrum range)??..
{ basically i am trying to make a audio recorder…the arduino will store the data in a wav file and transfer it to sd-card for playback }…

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