Design Two and a half-way closed box Drive units 2 x 115mm (4.5in.) dual layer MF 25mm (1in.) aluminium HF Frequency response 80Hz - 30kHz Crossover frequency 1.7kHz Amplifier requirements 10 - 150 W Sensitivity (2.83V/1m) 91dB (wall mount) 88dB (floor stand mount) Maximum output (SPL) 110dB Impedance 8Ω Internal volume 1.4 Litres Weight 1.5kg (3.3lbs) Dimensions (H x W x D) 600* x 140 x 35 mm (23.6 x 5.5 x 1.4 in.) Dimensions (H x W x D) centre mode 140 x 600 x 35 mm (5.5 x 23.6 x 1.4 in.) Finish Black