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Sound Post and Bass Bar for Dummies

Discussion in 'Setup & Repair [DB]' started by ii7-V7, Feb 27, 2006.

  1. ii7-V7


    Aug 4, 2002
    Baltimore, MD
    I've read alot of old post regarding the Bass Bar and Sound Post. There doesn't seem to be much concensus on the purpose of these components, but agreement that they are one of the most critical components of a DB.

    What does the Bass Bar do? What does the Sound Post do? And what would a bass sound like without one or the other? Or without both?

    I've heard that the Sound post is supposed to act like a piston, that it stops vibrations of certain frequencies, or that it stifles vibrations in certain areas of the top. I've heard that it allows the Bass Bar to move. Whats the real story.

    And what is the purpose of the bass bar other than structural?

    Please try to write your answers in English...as opposed to Engineerese!;)

  2. M_A_T_T


    Mar 4, 2004
    I believe the bassbar helps to transfer the bass frequecies across the top, and the soundpost transfers some of the frequencies and vibrations to the back.
  3. ii7-V7


    Aug 4, 2002
    Baltimore, MD
    Thank mchildtree for the link. I"ll copy the pertinent parts here.

    Good stuff. Thanks.