Tannoy SAT SUB Compact Wall Mount Subwoofer For Commercial Applications (Black)Slimline 6. 5" subwoofer for use in commercial background and foreground music applications. The subwoofer reproduces low frequencies below 400Hz and includes connections for the SAT 3 satellite loudspeakers (available separately). Wall bracket included. This product range is ideal for both background and foreground music in bars, restaurants and shops. Features Slimline 6. 5" subwoofer Integrated crossover and terminals for 2 or 4 satellite speakers