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stereo from mini-jack over XLR to one XLR input with two channels


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Like the tiltle said I won't to make the folowing audio configuration.

I have two small microfones who needs 1,5 phantom power. They come together (over a split) on one single minijack. With this minijack I want over an XLR cable into an XLR inpunt (specificly on a HPX-171 camera - input one). This input has the posibility to write to audio chanelles on a p2 card, so I'm wondering if it is possible to use one of these channels for Left and one for Right. Is a configuration like this possible and whath kind of switches I need (thinking about the phantom power and the splitted channels...)


Thanks a lot.


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can you give us any more infomation about the mics you are using? 1.5 phantom power?? do you mean 1.5 volt power needed? if so - phantom power is normally at 48volt ...


I don't think you need any switches... as you are not wanting to switch the mic between 2 inputs...


a good guide to different connection wiring is at the back of most mackie manuals - look at appendix b of http://www.mackie.com/Products/onyxiseries...nyx1620i_OM.pdf

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You're a bit mixed up. The socket on the camera can supply 48V phantom power and can route the socket to channel 1,2 or both. It's extremely unusual to want to parallel up two microphones, and even if you can do it, you'd simply have the same sound on both channels. (Which you could do in your editor, afterwards. It would be more useful, even if you do parallel then up (are you thinking interview?) just sticking them into one channel gives you no individual control over who's voice is louder. You have two XLRs, so one mic to each is the simplest and most practical solution.


However - most lav style mics need a low voltage 1.5-5V or so to power them - NOT phantom power, and in most cases, phantom needs a balanced connection to the mics, and modern lavs tend to be unbalanced. The mics you own will probably have available from the manufacturer exactly the adapter you need. It handles the conversion of 48 down to something the mic can use.


For what it's worth paralleling mics up rarely works well unless the level reaching each is identical, and never needs to change. If you are thinking interviews, you'll have two people who speak at different volumes, and have their mics at different distances from their mouths. In the edit this will be horrible. If one coughs, you can't duck that mic, or if one won't shut up, or they're having a heated discussion, you can't pull up the mutters and quiet comments made while the other is ranting.

Your camera has two channels, seems odd to not use them.


You might have a good reason to need to do it, but you haven't mentioned it?

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