TOP German Made CASSOTTO Accordion Hohner Imperator IV 120 bass, 14 sw. +Master admin | November 11, 2023 DOUBLE TONE CHAMBER – 2+2 CASSOTTO. HOHNER IMPERATOR IV 120 BASS LMMH. For generations, Hohner has dedicated everything towards music for a simple reason: Music is a way of life. In fact, you could say it`s the best way of life.