A pair of passive low impedance bookshelf speaker cabinets finished in black woodgrain vinyl with M6 mounting points at the rear. Each speaker provides maximum power conversion with most stereo amplifiers which can operate down to 4 Ohms, and is fitted with a 5.25" main driver and a 1" silk dome tweeter for balanced, full range output. A perfect match for Adastra and other low impedance amplifiers for background music, radio and voice announcements.Main driver[tab]135mmØ (5.25") reinforced paper cone[br]HF driver[tab]25mmØ (1") silk dome tweeter[br]Power handling : rms[tab]50W (each cabinet)[br]Power handling : peak[tab]80W (each cabinet)[br]Impedance[tab]4 Ohms (each cabinet)[br]Dimensions[tab]285 x 190 x 167mm (each cabinet)[br]Weight[tab]2.26kg (each cabinet)[br]Mounting hole centres[tab]75mm (2 x M6 threads)[br]Connections[tab]Push terminals +/-[br]Frequency response[tab]70Hz - 20kHz[br]Sensitivity[tab]95dB