Orange OR120 tube replacement?

Discussion in 'Amps and Cabs [BG]' started by Son of Bovril, Nov 3, 2005.

  1. Hi, my brother has an OR120 1970s odd guitar head with EL34s in it. Can this old head take 6550s? or even 6L6s?

    and what differences could I expect?
  2. The 0x

    The 0x

    Aug 24, 2003
    Timonium, MD
    Not without some modifications. If you want more headroom than what standard EL34s provide, you could try EL34Ls, which are supposed to have 20% more headroom.