AS50D PHANTOM POWER MIC

Discussion in 'Marshall Amps' started by guitarist100, Apr 3, 2020.

  1. guitarist100

    guitarist100 New Member

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    Guys looking for some assistance i am trying to mic my Taylor acoustic through the amp in the phantom power instead of plugging in via quarter inch jack to get a more natural sound but encounter feed back of different sorts no matter where i place the amp or mics( Shure 57 or shure 58 beta or Rode nt1a that i am trying , is the phantom power not meant for micing the guitar through the amp.
     
  2. ampmadscientist

    ampmadscientist Well-Known Member

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    Wait one second.
    Which Taylor do you have?
    What amp do you have?
    What are you plugging the microphones into? The guitar amp? Or a mixer?
    What device do you have to provide phantom power?

    Try to write out the signal path:
    Guitar > mic > mixer > amp (?)
    Guitar > guitar 1/4" out > guitar amp (?)
     
  3. guitarist100

    guitarist100 New Member

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    Taylor 614ce >mic> phantom power on a AS50D
     
  4. marshallmellowed

    marshallmellowed Well-Known Member

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    An SM57 is a dynamic mic, and does not require phantom power. The mic input may, or may not, have enough gain for an SM57.
     
    Last edited: Apr 4, 2020
  5. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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  6. marshallmellowed

    marshallmellowed Well-Known Member

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  7. ampmadscientist

    ampmadscientist Well-Known Member

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    OK
    Turn the master volume to zero.
    Turn off all reverb and chorus effects.
    Plug in the microphone to the mic input.
    Place the microphone 6 foot or more from the amp...
    (don't worry about using the guitar at the moment...)
    Push the "notch" button to the in position. (the notch is now turned on).
    Set microphone input volume knob at about 30%.
    Set microphone input bass treble straight up.
    Slowly raise the master volume, a little bit at a time, until the whistle (feedback ringing) "just" starts to happen.
    Adjust the frequency control up /down to a point where the feedback is canceled and the whistling will stop.
    (slowly adjust the frequency control up / down to find the sweet spot to stop the feedback).

    Now raise up the master volume a little more, until the feedback "just" starts to happen again.

    Now re-adjust (fine tune) the frequency control, to the minimum feedback.
    Re-adjust the microphone tone controls for the minimum feedback.

    Now push the "phase" button to the position that has the minimum feedback.

    Now continue to raise the master volume, and tweak out the feedback as above. Repeat until you get the sound dialed in, without the feedback.

    Using reverb and effects:
    this may cause more feedback. Add your effects after you get the sound dialed in to minimize the ringing and feedback.
     
    Last edited: Apr 4, 2020
    SHREDNECK likes this.
  8. Dogs of Doom

    Dogs of Doom Moderator Staff Member

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    from my experience...

    It's better to use a small diaphragm mic, w/ a narrow field, when mic'ing an acoustic guitar for amplification. You also have to make sure that the mic is extremely close to the guitar.

    Back in the old days of concerts, people stopped using acoustics mic'd, because the volume dropped so much, everyone would start talking over the music & the performance became 2nd to the chatter.

    That's why people switched to clean electric as a compromise, then the piezo pickup on the guitar...
     
    SHREDNECK likes this.

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