Shahriar Posted September 12, 2004 Report Share Posted September 12, 2004 HiI have a Multimedia headset (Stereo Headphone with Mic ), and I want to build a PreAmp for the Condensor mic, it has a stereo XLR 1/8" plugit is a very general headset and works with PC Sound cards perfectlyDoes any boady know the pin map of the Mic Plug,which of the following pics is correct? The model of the headset is 'GALAXY AP-860'.On the box of Headset iswritten (Mic:Condensor type),(Polar Pattern:Omni-directional)(Sensivity:-40db),(Connector:3.5mm Stereo Plug*2) ThanX in advance... Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 13, 2004 Report Share Posted September 13, 2004 Hi Shahrier,Over here, we call that type of microphone "Electret". A condensor microphone needs a high voltage of about 48V. An electret mic has a high voltage charge built-in, and also has a built-in FET that needs a small current at about 5V.Your 2nd diagram is for a stereo mic which headset mics don't have, so the 1st diagram might be correct. To confirm, just measure the voltages of a plug in your sound card. Quote Link to comment Share on other sites More sharing options...
Shahriar Posted September 13, 2004 Author Report Share Posted September 13, 2004 Thank you so much for your always complete answers and also for your explanation about PMPO.... Quote Link to comment Share on other sites More sharing options...
steven Posted September 16, 2004 Report Share Posted September 16, 2004 i hope this helps Quote Link to comment Share on other sites More sharing options...
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