mic amplify--> to line (RCA) level

Discussion in 'General Electronics Chat' started by StephenDJ, Dec 17, 2008.

  1. StephenDJ

    Thread Starter Active Member

    May 31, 2008
    I need a few good suggestions: what is the best dual opamp to use to get a stereo microphone level signal amplified up to rca line level?
  2. kubeek


    Sep 20, 2005
    Are you sure the mic is stereo? That seems kind of unusual, stereo mics are quite rare and mostly used with proper matched mic preamp, not with just a dual opamp. Or are you trying to get some lo-fi sound?

    I suggest you search for Green Pre, which is a bit more complex than one opamp per channel, but should have much better signal to noise ratio and less distortion than something extremely simple.

    So anyway, what is the mic for and where does the signal go after amplification?
  3. StephenDJ

    Thread Starter Active Member

    May 31, 2008
    No, this is NOT a real microphone, but a 4-channel Radio Shack microphone mixer which unfortunately does not have line level outputs. It only has L/R (left&right) mic OUT. I need to get the signal back up to line level after it leaves this mixer. I used to use a tape deck with L/R mic inputs stuck in record mode for this purpose, but for a long time I've been wanting to build a dedicated device.
  4. beenthere

    Retired Moderator

    Apr 20, 2004
  5. Audioguru


    Dec 20, 2007
    A preamp is simple. A low noise opamp with two resistors to set its gain.
    A RadioCrap mixer is awful. Why not use a real mixer?