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Kind of buzz/noise issue with my Mixer & Mic preamp PSU

Discussion in 'Preamps & Processing' started by cwar05, Jun 9, 2007.

  1. cwar05

    cwar05 Guest

    Hi all!

    I just bought a micpreamp -Presonus Tubepre- & I need to connect it on the same USA-EU transformer (they are US models connected on a European plug) of the one which is used to connect a Mackie VLZ 1202.

    it makes a kind of buzz/noise which is more than annoying for my voice recordings.

    Any ideas to solve this?

    Thanks for your answers!

  2. Boswell

    Boswell Distinguished Moderator Resource Member

    Apr 19, 2006
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    This sounds like a power supply, connection or grounding problem.

    How exactly are you connecting the Tubepre to the Mackie 1202? At what point in the signal chain are you listening when you hear the buzz? Is the earth connection taken through the step-up transformer?

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