I have an amplifier and speaker arrangement to give me basic sound. I'm using 2 small speakers, about 1" by 2". The speakers are in their own plastic enclosure with a provision to mount the speaker using a sufficiently small screw, probably 2-56 maybe 1-72. FWIW, the case will probably be pine.
It makes sense to make some form of grill or hole in the wood to make sure the sound can pass unobstructed. I could possibly cut 1/8" wide slots with an endmill or drill a series of holes. Which would be better, or does it matter?
Also, I'd like to keep little bits of debris from sticking to the speaker cone. Would a piece of cotton cloth or something similar work as "speaker fabric" without affecting the sound too much?