I've seen a clip on youtube of a guy who made his own contact mic by using an old telephone speaker, a tobacco tin and some spare guitar parts (see link)

He soldered the telephone speaker to a standard guitar out jack, and put that in a tin.

I'm trying to make one of these, but couldn't get hold of an old telephone, and (assuming that all speakers are the same) I bought a set to test it out with from the pound shop.

These speakers look like those small batteries that you get in watches, and I don't have the foggiest of what to do with them.

I have a jack, and soldering kit and these speakers,
But how do I do this?
Last edited by nattyb1 at Dec 7, 2011,
If i get what you mean, you want to take the mic out of a telephone and make an 'actual mic' of it, right?
If so, i guess the only thing you need to do is get the mic out of the telephone, find out the posi- and negative and then hook those up to the out jack
i got a bag of 100 piezo buzzers on ebay a few years ago. they make great contact mics for flat surfaces. I use them in acoustic and electric guitars. I superglue the bottom, brass side to the inside of whatever (usually near the bridge on guitars). Then I use shielded wire and run it out to a normal 1/4" jack (sometimes through a normal volume/tone setup). It drives guitar amps just fine. A little dark but definitely good.

edit: this is like what i got http://www.ebay.com/itm/100-Pcs-4KHz-20mm-Piezo-Disc-/180772113874?pt=LH_DefaultDomain_0&hash=item2a16db8dd2
Last edited by brentonlatour at Dec 9, 2011,