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I believe it could be you would just use a microphone as the audio source instead of a guitar. And you could certainly use a smaller speaker if you wanted.
I agree whole heartedly I should have put a grill on the speaker. The only reason I didn't was because I was running out of time. I was actually toying around with the idea of a fabric circle with a wire support that sat inside the metal mounting plate of the speaker. The only reason I didn't do this was because I don't know how to sew.
The Sound Sack - A Portable...View Instructable »
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