[1] In 1946, Wolf incorporated the studio as Cleveland Recording Company and moved operations to the Loew's State Theater building at 1515 Euclid Avenue.
Hamann recorded numerous hits at the studio, including The Outsiders' hit song "Time Won't Let Me" (1966), The Lemon Pipers' "Green Tambourine" (1967), The Human Beinz' "Nobody But Me" (1968), Velvet Crest "Look Homeward Angel" (1969), and the James Gang album Thirds (1970).
In 1970, Hamann and production engineer John Hansen purchased Cleveland Recording Company from Wolf and moved the studio to 1935 Euclid Avenue.
Hamann and Hansen ended their partnership in 1977 when the property was purchased by Cleveland State University, forcing the studio to move.
Upon Ken Hamann's death in 2003, Paul Hamann took over ownership of Suma Recording, and recorded many notable artists including David Thomas and Pere Ubu, The Black Keys, Alex Bevan, Rachel Brown, Chardon Polka Band, and many others.