Question about Marshall Mg100dfx 100-Watt Combo Guitar Amplifier

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When you turn it on its making buzzy sound even im not flug in

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One, You may Have a bad 1/4" jack on the Input, or Two you may have unballenced Bias on the Output Tubes. This is a technical adjustment in the Amplifier.

Posted on Oct 09, 2010

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Distortion is not produced in the guitar. Distortion is generated in the amp by circuitry that increses the gain until the waveforms "flat top". This creates higher harmonics and a buzzy sound. If you are getting a very low output from your guitar it is possible that you don't have enough output to get the distortion in the amp to work. Other settings in the guitar add harmonics by mixing more than one pickup. This is not ditortion but adding these harmonics changes the sound immensly.
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http://www.guitarelectronics.com/c=D65u46R1H9tko6CKpPLsjBhiJ/category/wiring_resources_guitar_wiring_diagrams/

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My line 6 spider III 15 watt amp isnt working properly. i turn it on but i get this sound when its connected to the guitar. it sounds like when a guitar is not connected to a guitar and the guitar cable is...


While it could be true that you're having a problem with the guitar or cable as the previouse expert suggested, to say that it can't be anything else is false. It could be a jack problem...it would only be apparant when the jack is making contact with a cable. I do think you should test it with another guitar and another cable but if that is not solving the problem then I bet it's a problem with the input jack of the amo itself or even one of the ionternal components (this is a digital amp and there are MANY components and settings that can trigger a problem like this) If the problem is not solved with a new cable/guitar configuration then it's time to take it to the shop.

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The Schecter C1 Fr Hellraiser comes with EMG active pickups I believe, did you try replacing the battery? Also unscrew the ends of your 1/4 inch instrument cable and make sure they are soldered properly. I am assuming you are going straight to your amp, not through any pedals?

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Hi there. Sounds like the power amp IC is shorted. Must replace.
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Amp turns on but no sound even with diff guitars and cords


Hi Dan
I wish I could just say what to fix, but you can not do this at home. Line 6 is a great amp and worth the time taking it down to the music shop , to be looked at an give you a repair estimate. good luck keep on rocking in the free world. DFD

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When i turn on my amp it makes a loud beeeeeeeeeeeeeeeep.


Turn the volume down.
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That should solve it.

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