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what does pre/di do actually? (newbie I

Discussion in 'Effects [BG]' started by rluk, Jan 20, 2005.

  1. rluk


    Nov 4, 2004
    Tallinn, Estonia
    Could somebody explain to me in human tongue what does
    pre/di actually do? :D

    Amplifies the sound coming from the instrument?
    What makes the preamps sound different then?

    I know this must of been asked a thousand times, but
    searching for preamp or di doesnt help at all :p
  2. seanm

    seanm I'd kill for a Nobel Peace Prize! Supporting Member

    Feb 19, 2004
    Ottawa, Canada
    A preamp and a DI are two different things (although they can be combined in the same unit).

    The preamp is the first stage of the amplifier with the tone control. It takes the instrument level and boosts it to a level that a power amp can handle.

    A DI takes a high impedance signal from the bass and converts it to a low impedence that a mixer requires. It basically makes a bass look like a microphone :p

    The reason you would combine them is to get tone shaping before you send the signal to the mixer. Without the preamp, the tone shaping could only cut, not boost.
  3. Droog


    Aug 14, 2003
    To expound upon the first post.

    Pre's boost to line level, which amps, and most pro gear like (consolse, rack gear etc.). Typically balanced, though not always.

    A DI balances the unbalanced Hi impedence signal, and turns it to Mic level, which Mic Preamps like, like on a console.
  4. rluk


    Nov 4, 2004
    Tallinn, Estonia
    thanks guys, it is a little bit clearer now :D