What Microphone Impedance for PC microphones?

[abrogard]

I just got one of those lapel, clip-on mics to replace the one that came with my digital recorder.

It has an impedance of 100ohms, it says on the box. I've got nothing to test it on except my digital recorder and my pc. It doesn't work on either. Is that because it is the wrong impedance? Can anyone tell me what impedance a typical pc mic should be?

For those who are paying close attention: yes, the old mic was not a 'pc' mic, it was a digital recorder mic. But it works in the pc, I find out now. I thought it was broken. I went and bought the new one. It didn't work. I tried everything in everything. I found the old mic does work after all, it works in the pc.

So the digital recorder must have a broken mic input, I didn't need the new mic.

But now I've got it. What use is it? Is it broken too? Should a 1000ohm impedance mic work in a pc?

regards,

ab

[JohnnyMalaria]

AFAIK, PC mics are usually at least a few kohm so your lapel mic probably doesn't have a strong enough signal. Have you looked for a gain option with your PC's mic input? Often there is a 10dB gain setting. Otherwise you'll likely need a transformer.

[MOVIEGEEK]

Most 3.5mm mic inputs are 300ohms but PC ports are unpowered,some lapel mics require inline power.

[edDV]

If this lapel mic was a 600 ohm balanced pro mic read this.
http://www.shure.com/ProAudio/Products/us_pro_ea_connectingmics