What's the best way to use good, balanced mics with Sony PCM-D50?

Discussion in 'Location Recording' started by Stokestack, Sep 23, 2011.

  1. Stokestack

    Stokestack Active Member

    Hi all.

    This has probably been beaten to death, but I started wading through a couple of the stickies and gave up.

    I bought a Sony PCM-D50 recorder because of its limiter (which works by recording at two levels simultaneously), thinking it would be handy for film & video (my primary uses). The problem is that it only has a crappy 1/8" stereo input. This input does have a switch for mic vs. line usage.

    What kind of level or impedance conversion do I need to do for real mics? I have a belt-mount phantom power supply with XLR in/out, so I was going to try simple XLR-to-RCA adapters and then into the 1/8" jack. Will this work? If not, what's your recommendation for the lowest-noise solution?

    BTW, I had tried to rig up an XLR-to-1/8" setup for testing, and got an outrageous amount of noise. I figured it was bad wiring.

    I'm primarily using a Rode shotgun, and I have a couple of AKG C3000s.


  2. Stokestack

    Stokestack Active Member

    I just found a post elsewhere about my exact setup (mic --> Denecke PS-2 --> PCM-D50) producing this problem, and the guy solved it with this:

    [URL="link removed LMT100 - Low to High Impedance Matching 8111240 B&H[/URL]

    So I guess I have my answer.
  3. RemyRAD

    RemyRAD Well-Known Member

    That is correct. You cannot unbalance a balanced microphone when you are powering with phantom power. For that reason, you have to hook that microphone into a balanced input (a matching transformer). Then the secondary (the output of the transformer) can then be unbalanced into a 1/8 inch mono plug.

    Go get'em
    Mx. Remy Ann David
  4. Stokestack

    Stokestack Active Member

    Thanks. All that's left will be to make a Y to combine the two unbalanced connections into a stereo 1/8" plug (for those occasions when I'm recording with two mics).
  5. RemyRAD

    RemyRAD Well-Known Member

    Xactly! Yup.

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