Revox speakers True studio sound quality Revox Bass S04 Active The Revox Bass S04 Active exposes you to the fascinating world of deeper frequencies. Whether as the foundation of a fine stereo system or for a large home cinema, it impresses through the way seemingly incredible amounts of sound come out of such compact dimensions. Revox offers the Active Bass in a white structured lacquer and deep black, matte lacquer finish. Revox Bass S04 Active white Technical Data: Revox Bass S04 Active Revox Bass S04 Active rear view Detail spikes Detail spikes