BX2 Years Active 2010-2015 Former What Hi-Fi? Product of the year, deceptively powerful 2 -Way bookshelf speaker with 6 1/2 C-CAM drivers. Technology C-CAM tweeter with bandwidth beyond 30 kHz 6 1/2 C-CAM bass and mid-range drivers refined by FEA analysis. Single bolt-through drivers. A design feature which means the driver is not fixed to the front baffle and cannot transmit vibrations and therefore colouration to the cabinet. Improved cabinet rigidity and stability. HiVe II port technology to speed the transit of air from the cabinet, resulting in more dynamic bass. High-quality terminal panels blend easy access with high-end functionality. Frequency Response 42 Hz - 30 kHz Sensitivity (1W@1M) 90 dB Nominal Impedance 8 Ohms Power Handling (RMS) 100 W Recommended Amplifier Requirements 30 - 100 W Cabinet Support Front ported bass reflex. HiVe II port technology Crossover Frequency 3.2 kHz Drive Unit Complement 1 x 165 mm (6 1/2) C-CAM bass mid-range driver 1 x 25 mm (1) C-CAM Gold Dome tweeter External Dimensions (H x W x D) 350 x 185 x 255 mm (133/4 x 75/6 x 101/16 inches) Weight (each) 5.84 kg (12.8 lb)Condition: Clean and practically pristine. Binding posts not included.Tested: I listened to these for weeks they sounded crisp clear and accurate pure pleasure!