Whether as music speakers for your study or family room, rear speakers in a home theatre system or general purpose speakers, the Q300 bookshelf speaker will absolutely open up a world of audiophile quality sound at a surprisingly affordable price. Model Q300 Design Two-way bass reflex Drive Units 165mm (6.5in.) aluminium Uni-Q 25mm (1in.) vented Aluminium dome HF Frequency Response ±3dB 42Hz - 40kHz Crossover Frequency 2.5kHz Amplifier requirements 15 - 120W Sensitivity (2.83V/1m) 87dB Maximum output (SPL) 110dB Impedance 8Ω