1. Please take 30 seconds to register your free account to remove most ads, post topics, make friends, earn reward points at our store, and more!  

Ampeg SVT-IIP loud hum w/o instrument cable.

Discussion in 'Amps and Cabs [BG]' started by Jefenator, Mar 13, 2009.


  1. Jefenator

    Jefenator Supporting Member

    Aug 22, 2008
    Oregon
    Been enjoying this Ampeg tube preamp for a few months now. One quirk: it puts out a loud hum when there is no instrument cable in either input jack. (Never had another head or preamp do this.)

    Is this normal for certain amps? Or is it some kind of minor malfunction? The unit seems to be fine, otherwise.

    Expert speculation and/or insights would be most welcome. (Please pardon my ignorance - this is my first excursion in to SVT-land.)

    TIA! :cool:
     
  2. WingKL

    WingKL

    May 12, 2007
    The input jacks are probably not grounded or are not shorting correctly when the plug is not inserted.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.