a stereo speaker system with two spaced - apart speaker housings is adapted for mounting on the backrest of a chair by attachment thereto with a universal , adjustable mounting bracket . each speaker housing is adjustably supported on opposite sides of the space occupied by a person &# 39 ; s head while sitting in the chair by a support arm adjustably connected to the speaker housing on one end and adjustably connected to the mounting bracket on the opposite end . the mounting bracket has downwardly extending members for gripping the front and rear surfaces of the chair backrest , the space between the front gripping members and the rear gripping members being adustable for removable mounting on the chair and for mounting on a variety of chairs with varying sizes of backrests .