Instagram/Christopher North & David Music Ambrosia founding keyboardist Christopher North, the "Hammond B3 King," has died at 75. Remembering his iconic sound and brave health battles. April 1, 2026 AceShowbiz - Christopher North, the founding keyboardist of the progressive and soft-rock band Ambrosia, has died at the age of 75. His passing was confirmed by the band in a statement shared on their official Facebook page. While the exact cause of death was not disclosed, it was noted that he had endured a series of serious health challenges in recent years.