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Annoying Hiss

Discussion in 'Pickups & Electronics [BG]' started by cabo420, Dec 5, 2013.

  1. cabo420


    Jan 9, 2012
    I have a Fender MIM jazz bass that has an annoying high frequency hiss in it when I am not playing. When I turn the tone knob all the way off it goes away. The has shielded pickup cavities. Any ideas I can do to fix this?
  2. Bryan R. Tyler

    Bryan R. Tyler TalkBass: Usurping My Practice Time Since 2002 Staff Member Administrator Gold Supporting Member

    May 3, 2002
  3. cabo420


    Jan 9, 2012
    no one?
  4. megafiddle


    May 25, 2011
    Hiss is generated by active circuits, and normally occurs in the preamp (input) stage of the amp.
    The level of the hiss depends on both the gain setting of the amp, and the impedance of the source.
    The source in this case is the bass. The tone pot affects the bass output impedance at high frequencies

    If everything is working normally, the gain of the amp may be set too high. It is basically a matter of
    signal to noise ratio.

    Is the bass ouput level good? Are the volume pots set reasonably high? And the pickup height set

    If the bass output is weak, the amp gain will have to be set abnormally high, and the input noise (hiss)
    will be amplified.

  5. grendle


    Mar 4, 2011
    Central FL
    A fender jazz with hiss??? Say it isn't so... That never happens. Search man, search