Design: 3-way, 4 drivers, floorstanding, Bi-wiring, front bassreflex port,crossover points 600Hz 4kHzTLIE Enclosure High-Frequency Driver:  25mm (1"), TWG faceplate, silk dome Midrange Driver:  133mm (5.25"), paper cone Bass Driver:  2 x 203mm (8"), paper cone Recommended Amplifier Power:  20-180W Frequency Response:  30Hz-25KHz Impedance:  6 ohm Sensitivity:  89 dB Dimensions (H x W x D):  108 x 24,5 x 31,2 cm (excl. spikes) Weight (net):  36.8 kg pair