RCF Precision LF18 G400 2000watts 18 Inch Naked Bass Speaker

–        The RCF LF18G400 is a very powerful 18″ woofer that handles a 1,000 watts AES, 2,000 watts program power –        Features a triple roll for extra stability, a large 4″ voice coil & a high xmax of 9.0mm –        Very deep rich low frequency down to 25hz –        2 aluminum demodulation rings above and below the t-yoke ensures less distortion at low frequencies as well as greater excursion –        This model is preferred for thx and high fidelity applications and all very low distortion high power subwoofer systems for concert, theater, etc. –        Nominal Basket Diameter: 18″ –        Impedance: 8 ohms –        AES Power Rating: 1,000 Watts –        Program Power: 2,000 Watts  –        Frequency Response: 25Hz – 2.0kHz –        Sensitivity (1W/1m): 97.5dB –        Voice Coil Diameter: 4″ / 100mm –        Max. Excursion Before Damage: 2″ / 50mm –        Voice Coil Winding Depth: 1.0″ / 25m –        Cone Material: Carbon Fiber –        Overall Diameter: 18.3″ / 465mm –        Bolt Circle Diameter: 17.4-17.6″ / 442-447mm –        Baffle Cutout Diameter: 16.7″ / 424mm –        No. Of Mounting Holes: 8 –        Mounting Hole Diameter: 0.3″ / 6.5mm –        Flange Thickness: 0.6″ / 14mm –        Overall Depth: 8.3″ / 210mm –        Volume Displaced By Driver: 7 Liters / .2ft^3 –        Net Weight: 13.3 kg. / 29.3 lbs. –        Shipping Weight: 14.3 kg. / 31.5 lbs.   –        THIELE-SMALL PARAMETERS: –        Resonant Frequency (fs): 28 Hz –        Impedance (Re): 5.1 ohms –        Coil Inductance (Le): 2.5mH –        Electromagnetic Q (Qes): 0.29 –        Mechanical Q (Qms): 4.6 –        Total Q (Qts): 0.27 –        Diaphragm Mass (Mms): 190 grams –        Compliance Equivalent Vol. (Vas): 360 Liters/12.71cu. ft. –        Surface Area of Cone (Sd): 0.122 square meters –        Voice Coil Overhang (Xmax): 9.0mm –        BL Factor: 24.2T-M –        Reference Efficiency: 2.63%