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sansamp bddi switches

Discussion in 'Effects [BG]' started by fender3x, Apr 6, 2006.

  1. fender3x


    Mar 12, 2006
    There are a couple of new switches on the more recent Sansamp BDDIs... What do they do? Are they useful/necessary?
  2. SuperDuck


    Sep 26, 2000
    They switch the output of the signal from an Instrument level, that is, what you would send to an amp, to a Line level, which is the Instrument signal plus some amount of gain. Which basically means louder. (I don't remember how much.) There is one switch each for both the XLR output and the 1/4" output.

    Being able to switch to a line level output is handy if you are using the Sansamp as the only preamp going into a power amp - before the switch was added, a lot of people felt it wasn't giving the amp enough of a signal to really drive it.

    The other switch, which might have been on previous models, is one that allows you to accept phantom power from a mixing console.
  3. It's called a ground lift switch, and more importantly than allowing you to use phantom, it can help to prevent ground loops forming between you and the PA. Sadly, you can only have one or the other, if you want phantom you need ground connected, if you want to try to stop a ground loop, you need ground lifted.
  4. fender3x


    Mar 12, 2006
    Thanks for the quick responses...

    I also got one directly from Tech 21, and got a link to the owner's manual... Just attaching it to the thread in case anyone else is interested.
  5. fender3x


    Mar 12, 2006

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