Mapletree Magic 5SE preamp. Uses 3 topographies for different sounds. 1.Cathode follower with 12sx7 tubes. 2. SRPP. 3. Passive volume control. Three inputs. Orange painted --called GE Orange by the maker. One worn spot on painted edge near from volume control. Asking $525.
Have another pair of as new 12sx7 (12sn7 military grade replacements) for $50.
~tom