Q Acoustics 3010 Compact Bookshelf Speakers (Pair) (Graphite) These What Hi-Fi? award-winning, ultra-compact 3010 speakers achieve outstanding performance by utilizing the 3000 Series, 2-in-1 concentric advanced ring dome tweeter, Aramid fiber/paper cones for the 4-inch bass unit, uprated audiophile crossover components and a stronger, lower resonance cabinet Enclosure: 2-way reflex. Bass Unit: 100mm. Treble Unit: 25mm Sensitivity: 86dB. Recommended Power: 15-75w. Crossover Frequency: 2.8kHz Frequency Response (+/-3dB): 68Hz-22kHz. Normal Impedance: 6 ohm. Minimum Impedance: 6 ohm Box includes: 2) Q Acoustics 3010 Bookshelf Speakers (Graphite), (2) Magnetic Speaker Grills, (2) Port Bungs, (1) User Manual, (8) Rubber Speaker Grips