Design: Bookshelf speakers, 2-way, 2 drivers, 15mm MDF TLIE enclosure Crossover points 3kHz Magnet grill High-Frequency Driver: 25mm (1”), TPTTD, TWG faceplate, TTP Bass / Midrange Driver: 102mm (4") TPAIC, TAVS Recommended Amplifier Power: 20-100W Frequency Response: 42Hz-40kHz Impedance: 6 ohm Sensitivity: 86 dB Dimensions (H x W x D): 23 x 14.5 x 21.4 (incl. grill) Weight (net): 8.1 kg / pair