The power supply for one of my wireless mics went dead. It's 12VDC 400mA. I found a 12VDC 1A power supply. Is there a way to lower the current coming out of the power supply I found? Could I use a resistor?

Jeff, this is like house wiring. You can plug a 60 watt lamp or a 1400 watt toaster into the 110volt AC outlet. (Or like 25 or 70 volt speakers) They work fine because they are designed to use 110volts AC (or 25/70 volt audio feed) and DRAW only the amount of power they need. Your Mic will work fine, assuming the power supply is truly 12volts DC @ 1 amp, and not designed to feed 1 amp at 12 volts due to load, and jumps to 14 volts @ 1/2 Amp. Check the power supply without a load and if it doesn't go over 12.5 volts dc, all will be fine.

I just put my meter on the power supply and I got 16.5 volts. Looks like it isn't gonna work for me.

Jeff you could add a 12v Zener diode and resistor but it would be easier to just get the right power supply

Merrit has the right idea. Either that or a 7812 voltage regulator and .01uf cap and 100uf cap, both rated at 50 volts or more and something to mount them on and and and. Just get a good 12 volt dc regulated P/S. Oh, and watch the polarity!

Yeah I was trying to get it to work for my event tonight...wanted all 6 wireless mics but just used 5. My boss will get a power supply from the sound company during the week. I just worked a 12 hour day for a tech event