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Gound switch on my DI

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  • Gound switch on my DI

    what does a ground switch on a DI do? I tried switching it on and off on a recording and I didn't notice any change in tone ?

  • #2
    DI's are supposed to be isolators but if you got multiple ground hum it should kill that. There might be some 2 vs 4 conductor polarity/phase issues too but I don't actually know.
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    • #3
      There are some situations where a DI box can create a "ground loop" - which is where an amplifying device has two ground paths. This can cause AC hum or buzz from the electric mains. The switch is there to break the loop, it doesn't change the TONE in any way. If one position of the ground lift switch has less noise, leave it in that position. If it doesn't make any difference, don't worry about it.
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      • #4
        it lifts you from the ground so your playin becomes more heavenly

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        • #5
          Is the ground hum from the gain pedals or the amp's dirty channel ?

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          • #6
            You can troubleshoot that one yourself. The ground lift will only kill hum if it's caused by the connection.
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            • #7
              Originally posted by mbengs1 View Post
              Is the ground hum from the gain pedals or the amp's dirty channel ?
              It doesn't matter...any "gain" device - compressors, preamps, overdrives, distortions, fuzz pedals, boosters and others can and usually will bring up the level of any AC hum or buzz that is ALREADY PRESENT in the signal. Gain just makes it louder, and acts like a compressor, bringing up the 'low level' noise...it doesn't matter if it's a pedal or an amp's channel. .

              Ground loops cause noise, gain amplifies it and makes it louder.

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