Originating directly from the experience of the Thesis line components, the Voce woofer features an aluminium basket with a great aerodynamic structure, a cotton-fibre paper pressed cone with Light Damping treatment, a Triple Wave surround in butyl rubber and extremely light Copper Clad Aluminium Wire coils. Features: 1: The profile of the aerodynamic basket’s spokesalong with the open-air design ensure drasticreduction of back-wave reflections. 2: The exclusive Butyl rubber Triple Wave surroundprofile provides full linearity as well as reliableperformance under extreme conditions. 3: Extremely lightweight and compact, the CCAW(Copper Clad Aluminium Wire) voice coils woundon double layer provide very high efficiency andneat, dynamic sound. 4: Cotton-fibre pressed paper cone with LightDamping treatment. 5: The Radial Venting System ensures high thermalcapability, power handling and reliability. Size 165 mm Power Handling - Peak 200 W Power Handling - Continuous 100 W Impedance 4 Ohm Frequency Response 50 ÷ 7k Hz Voice Coil Ø 30 mm Voice Coil Material CCAW Woofer Qes 0,82 Xmax 3 mm D 130 mm Re 3.5 Ohm Fs 68 Hz Vas 8.2 l Mms 16.1 g Cms 0.34 mm/N BL 5.5 T•m Qms 7.84 Qts 0.74 Le Standard 0.31 mH Le mH@10kHz 0,07 0.17 Spl 91 dB