Jens Ritter Instruments Jens Ritter Instruments Jens Ritter is a German artist. After his studies of mechanical arts, his focus was creating avant-garde guitars for Prince, George Benson, Nile Rodgers, Lady Gaga and other major music production artists. Jens Ritter Instruments Jens Ritter is a German artist. After his studies of mechanical arts, his focus was creating avant-garde guitars for Prince, George Benson, Nile Rodgers, Lady Gaga and other major music production artists.