Focal - Easya Wireless Powered 2 1/2 Way Floorstanding Speakers - Black (Pair) Polyglass bass/midrange: 5" Amplifier power (RMS): 85W - 4 Ohms @ 1% THD+N Mains frequency: 50 / 60Hz Frequency response (+/- 3 dB): 50Hz - 28kHz Dimensions (HWD): 35.6" x 6.8" x 9.5"