18-in Extended LF Ferrite Transducer w/Carbon fiber reinforced straight ribbed cone 8 Ohms

98 dB SPL 1W / lm average sensitivity 100 mm 4 in Interleaved Sandwich Voice coil ISV 1000W AES power handling Carbon fiber reinforced straight ribbed cone Double Silicon Spider DSS for improved excursion control and linearity Double Demodulating Rings DDR for lower distortion Improved heat dissipation via unique basket design and multiple backplate vents Weather protected cone and plates for outdoor usage Ideal for high SPL subwoofer designs Nominal Diameter 460 mm 18 in Rated Impedance 8 Ohm Program Power 1400 W Peak Power 7000 W Frequency Range 28 - 2500 Hz Power Compression -10dB 0.8 dB Power Compression -3dB 2.1 dB Power Compression Full Power 3.0 dB Recomm. Enclosure Volume 130 - 350 It. 4.59 - 12.36 cuft Minimum Impedance 6.4 Ohm at 25 DegreesC Max Peak To Peak Excursion 50 mm 1.97 in Voice Coil Diameter 100 mm 4 in Voice Coil winding material copper Suspension Triple roll. Polycotton Cone Straight Ribbed. carbon fiber reinforced paper THIELE SMALL PARAMETERS Fs 31 Hz Re 5 Ohm Sd 0.1225 sq. mt. 189.88 sq. in. Qms 7.2 Qes 0.31 Ots 0.29 Vas 297 It. 10.49 cuff Mms 190 ar. 10.42 IN 81 24.7 Tm Linear Mathematical Xmax +/- 9 mm +/- 0.35 in Le 1 kHz 2.3 mH Ref. Efficiency 1W 1m half space 96.5 dB Overall diameter 462 mm 18.18 in N.of mounting holes and bolt 8 Mounting holes diameter 8.5 mm 0.33 in Bolt circle diameter 438-440 mm 17.24-17.32 in Front mount baffle cutout diameter 416 mm 16.38 in Rear mount baffle cutout diameter 1422 mm 16.61 in Total depth 215.4 mm 8.48 in Flange and gasket thickness 26 mm 1.02 in Net weight 13.3 kg 29.36 lb Shipping weight 14.9 kg 32.9 lb CardBoard Packaging dimensions 482 x 482 x 257 mm19 x19 x10.1 in