Around 2 years ago I made the mistake of putting a Single in my Little Dot I+ which uses Dual opamps. I only realized the mistake after I was hearing sound from one side of the headphones. Was a terrifying experience but my I+ is still alive and well till today. So I guess putting single opamps in dual slot wouldn’t fry them? Perhaps it was putting dual in single slots that messed up the whole current flow and burnt the op-amps? @raoultrifan could you do a explain-like-im-5 for us?