Problem: MXR M108S EQ pedal is overdriving my guitar signal

Discussion in 'Gear & Equipment' started by Izalith, Nov 5, 2017.

  1. Izalith

    Izalith SS.org Regular

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    I'm new to EQ pedals, but this is fucken weird.

    Stock Ibanez RG8 > EQ Pedal > Fender FM212R

    The tone is nice and clean, but once the pedal is engaged is sounds like an OD pedal. Lowering Pre-Gain and Post-Vol sliders doesn't fix the problem.

    Bought it used from GC. Do I have a fucked up pedal?
     
  2. KailM

    KailM SS.org Regular

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    Are you sure you're using the correct power supply? It should have come with its own power supply which is 18 volts, not 9 like most pedals run. I could see it acting funny without that.

    But also, if you've got any of the sliders set to boost, it'll boost your signal even if both the volume and gain sliders are at zero. If you don't want it to boost your signal overall, you'd have to set your volume/gain to negative values to compensate.

    Barring those things, yeah, it sounds like there could be something wrong with it.
     
  3. mongey

    mongey SS.org Regular

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    As above. I have tried to run my mxr 10 band at 9 volts and while it works, it’s got no head room and clips
     
  4. Izalith

    Izalith SS.org Regular

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    I'm using a Donner power supply(DP-2) using the 500mA 18v out. All sliders are set at zero. Lowering the volume on my guitar does clean up the signal.
     
  5. mnemonic

    mnemonic Custom User Title

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    Sounds like you're clipping the input with too loud of an input signal. That's weird though since stock RG8 pickups are barely even moderate output (unless something has changed recently).

    Assuming that power supply is fine, there could be something wrong with it, leaky capacitor or something, causing it to distort.

    Do you have the ability to go to a store and try another one?
     
  6. Izalith

    Izalith SS.org Regular

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    I'm gonna go test it out again at GC. It's probably faulty.
     
  7. Ibycan7

    Ibycan7 SS.org Regular

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    IMO, the reason it is acting like an OD pedal, is because you are pushing the front of the amp with it, I also have the MXR 10 band EQ, and I use it on the effect loop not in front of the amp for tone shaping . what's your purpose for having the EQ?
     
    HateTank likes this.
  8. Izalith

    Izalith SS.org Regular

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    I was hoping to eq my fuzz pedals.
     
  9. HateTank

    HateTank SS.org Regular

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    I agree with him. I think you will be much happier with it in the loop. I mean after all you want your over all tone to sound better right? An eq before or after an overdrive can really change the overall tone and not necessarily in a good way. It's all relative to what each person thinks sounds better but it's an unnecessary problem you are having IMO.

    If you are new to EQ's this video is very informative.
     

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