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My TRS cable to FRFR sounds brighter? But getting noise from an XLR

Discussion in 'Axe-Fx II Discussion' started by bgrizzmayne, Sep 26, 2013.

  1. bgrizzmayne

    bgrizzmayne
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    I posted a thread a few days ago about having a hard time with thin, shrill tone from the Axe. I may have discovered a contributing problem; when I plug in a TRS cable vs. an XLR cable, my tone is significantly brighter/more brittle. I much prefer the tone that I get from an Axe hooked up via XLR.

    The problem is that I get a small hum/noise interference whenever I hook up XLR. Also, I was planning on going to FOH via output 1 with XLR, and then going to my monitor on output 2 with a quarter inch.

    Are TRS cables supposed to be brighter? It really doesn't make sense to me, but I know what I'm hearing. AB-ing between them on the same output, and XLR sounds way better, it's just noisy. I tried a different XLR cable as well, so the XLR isn't causing the noise. but right when I unplug the XLR, the noise goes away from my FRFR.

    The FRFR is a matrix q12a btw. I bought it used from the emporium on TGP, but it's in good shape.

    Upon further inspection, it seems it's a problem with the Matrix Q12a I'm guessing.
     
  2. Kriig

    Kriig
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    Try "ground lift"
     
  3. FractalAudio

    FractalAudio
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    Flip the ground lift switch on the back.
     
  4. RobinMatrix

    RobinMatrix
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    Hi Ben,

    Electrically, the TRS connection and the XLR connection are identical. They connect to exactly the same electronics, pin for pin. If you are getting a difference when using an XLR and a TRS cable, then there must be some difference between the cables. There should be no difference in "brightness" using a TRS instead of an XLR if the cables are correctly wired.

    I would guess that the XLR cables have had their "grounds lifted". Check you have continuity on Pin 1 of the XLR and on the screen/body of the TRS ...
     
  5. javajunkie

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    The 1/4 outputs on output 1 are unbalanced (a TRS will not do you any good here), that will give you a weaker signal. The XLRs probably sound better to you because they are louder. Generally we perceive louder as better. You can use the ground lift switch on the Axe-fx XLRs for removing hum.
     
  6. bgrizzmayne

    bgrizzmayne
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    The TRS is actually louder, but thanks guys! Ground lift did the trick! had no idea that the Axe's XLR had a ground lift. Maybe my ears are playing tricks on me regarding the TRS being brighter. Maybe picking up a Humbuster cable would help?
     
  7. FractalAudio

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    XLR is the preferred connection as it is balanced. Balanced cable runs are preferred over unbalanced.
     
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  8. javajunkie

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    Unbalanced should 6bd below a balanced. You should just use the XLR.
     
  9. FractalAudio

    FractalAudio
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    The unbalanced and XLR outputs are the same level in the II. In the original Axe-Fx the XLR outputs were 6 dB hotter. This is not the case with the II.
     
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  10. yek

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    Aha, that's new information.
     
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  11. chris

    chris
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    n00b.
     
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  12. Kriig

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    More food for WIKI ;)
     
  13. yek

    yek
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    Hahaha! :mrgreen
     
  14. javajunkie

    javajunkie
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    Interesting. Thanks,
     
  15. yek

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