How to phantom power a cheap computer mic.
Condenser mics that are made to connect to a laptop are dirt cheap and have very good high end response. Running one on 48V phantom power is much easier than a lot of people seem to think. Just connect the capsule directly to pins 2 and 3 of your XLR, and pull pin 3 towards ground (pin 1) with a 47K resistor to create a 6V differential across the capsule.
I believe it's even roughly "impedance balanced", as the ECM floats much the way a transformer in a dynamic mic would (the 47K additional loading on one side being negligible). Just make sure neither ECM wire connects to a metal casing that might get grounded.
You can buy cheapo headset mics through eBay. I like those because they come with a little gooseneck. I use this one to mic hi-hats.
Billy Gibbons (Z.Z.Top)
Reeves Gabrels (Bowie)
Richard Lloyd (Television)
Adam Granduciel (War On Drugs)
Jimmy Vivino (M.Weinberg 7)
Skip Dorsey (J.Timberlake, B.Spears)
Peter Holmstrom (Dandy Warhols)
Scott Shriner (Weezer)
Randy Mitchell (Donna Summer)