KEF Q7 speakers Brand: KEF Type: Q7 3-way bass reflex Wattage: 15-175 watts RMS Impedance: 8 ohms Frequency range: ‪35-27000 Hz Sensitivity: 91 dB Bi-amping/wiring: Yes Weight: 17.6 kg each Size HxWxD: 98.7 x 25.8 x 36.6 cm‬ The 165 mm (6 1/2") UNI-Q mid/HF driver array includes KEF's advanced new 19 mm (3/4") metal dome tweeter (ferrofluid-cooled for improved load capacity), so the midrange is silky smooth and the vocals are extraordinarily clear. With the aperture area of a conventional 200 mm (8") cone, KEF's unique B169 ''racetrack'' format LF driver delivers great bass for such a slim case. Computer-designed crossovers optimise sound quality, and KEF's internal reinforcement eliminates the speaker resonances that often affect high speakers of full size.