How do i rig a simple mic to a speaker.?

This year I'm making my own Halloween costume and the head piece I'm making will not have a good voice projection through the mask. I just want to put a mic on the inside and incorporate a small speaker on the outside.?

iceng6 years ago
A purchased speaker amp or a DIY circuit schematic for an electret mic
thegeeke6 years ago
You do not need an amp in between... (unless you want to hear your mic...) (or you might have powered speakers, in which case you don't need an amp, because it is built right into the speaker)

But in all seriousness, it is very simple. A microphone is basically a speaker that is reversed. (At least in the consumer world... in the pro world it can be a little different.) All you need to do is hook your positive and negative outputs (respectively) into the positive and negative inputs of an amp circuit. Then take the pos and neg outputs of the amp circuit and hook them into your speaker inputs. (Don't forget to power your amp.)

Watch for feedback as orksecurity said, feedback is a howling noise that happens when your mic can "hear itself" in the speaker. (Microphones and speakers have imperfections in the sound that get amplified when the mic goes into a feedback loop)

Have fun!
iceng6 years ago
You put an amplifier between the microphone and the speaker.
lemonie did this in his excellent corvid costume audio you should emulate.

orksecurity6 years ago
You need a suitable amplifier between them, with input impedence appropriate for the microphone you want to use and enough amplification to drive the speaker.

Watch out for feedback.