Model Q750 Design Two and a half-way bass reflex Drive Units 165mm (6.5in.) aluminium Uni-Q 25mm (1in.)vented aluminium dome HF 165mm (6.5in.) aluminium LF 2 x 165mm (6.5in.)aluminium ABR Frequency range free field 42Hz (-6dB) Frequency Response 48Hz-28kHz (±3dB) Crossover Frequencies 2.5kHz Maximum Output 111dB Amplifier requirements 15-150W Sensitivity 88dB Nominal Impedance 8 Ohms (min.3.8 Ohms) Dimensions H x W x D: 923 x 210 x 306 mm 977 x 323 x 310 mm (with Plinth) Weight 16.5kg (36.4lbs) Unit measurement Pair