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"Tone suck" issue---diagnostic regimen suggestions?

Discussion in 'FX8 Discussion' started by MRH, May 15, 2019.

  1. #1 MRH, May 15, 2019
    Last edited: May 15, 2019
    MRH

    MRH
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    I have been a FX8 (original device, upgraded firmware) user since 2016.
    Using a 4-cable setup with my Fuchs ODS-II very successfully since then.
    (Using two Humbuster cables for send to amp in, and back to amp effects loop return.)

    In recent months (not sure exactly when the change occurred), I've noticed some "tone suck" when comparing FX8 presets (even a fully bypassed, no effects patch) with the FX8 "true bypass" mode. There is a noticeable loss of gain and some high-frequency loss. In my earlier programming phase, I did side-by-side comparisons using true bypass and found the FX8 to be essentially transparent, no deterioration in overall gain and timbre. Something has changed.

    1) I have removed effects loop cables, problem still occurs
    2) I have replaced Humbuster cable from FX8 to amp input (with regular instrument cable), problem still occurs.
    3) I have checked various FX8 Global and I/O settings, no changes there.

    I am seeking advice to make sure my diagnostic regimen is thorough before I draw any conclusion about the FX8 itself.

    Thanks for any commentary on this.
     
  2. Eduard

    Eduard
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    Inspired

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    Did you try another guitar already?
     
  3. MRH

    MRH
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    Yes, this is independent of guitar. "True bypass" confirms that.
     
  4. DLC86

    DLC86
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    Out level knobs are all the way up?
    Global EQ flat?
     
  5. MRH

    MRH
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    Yes to both.
     
  6. MRH

    MRH
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    Thanks to all who responded. It looks like the issue was the need to recalibrate both of my expression pedals. The culprit was the external pedal assigned (continuous controller) to the front-end volume. It was not being recognized for its full 0-100 travel anymore, and therefore attenuated the input signal somewhat at the top of its travel. Recalibration seems to have solved this.
     
    OrganicZed, assinger and DLC86 like this.
  7. quasimono

    quasimono
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    That is a great hint for future prospects with the same problem, thanks m8!
     

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