S8-M7 Speaker system Fay Loudspeaker units Cooler: 20 om (8 inches), cone type Mid range: 10 om (4 inches), cone type Tweeter: Rated Impedance 8 ohms Maximum recommended amplifier power 200 W (Non clip) Characteristic sensitivity level 86 4B (1W, 1m) Active frequency range 47 Hz 16 20,000 Hz (-3 dB) Crossover frequency 406 Hz. 4000 Hz/24 diffract Dimensions (width) Approx. 400 X 735 x 400 mm (15, inches} Mass Approx. Optional accessories Speaker stands WS-M7 .