21-in Extended LF Neo Transducer w/high grade neodymium magnet assembly 8 Ohms

94 dB SPL 1W / 1 m average sensitivity 100 mm 4 in Interleaved Sandwich Voice coil ISV 3200 W program power handling 70 mm 2.76 in peak to peak excursion Composite reinforced straight ribbed cone Optimized high grade neodymium magnet assembly Recommended for subwoofer usage in compact vented or bandpass enclosures Nominal Diameter 533mm 21 in Rated Impedance 8 Ohm AES Power 1500W Peak Power 7200 W Frequency Range 30-1800Hz Power Compression -10dB 0.62 dB Power Compression -3dB 2.18 dB Power Compression Full Power 3.57 dB Max Recomm. Frequency 150Hz Recomm. Enclosure Volume 120-300 It 4.24 - 10.60 cuft Minimum Impedance 6 Ohm at 25 DegreesC Max Peak To Peak Excursion 70 mm 2.76 in Voice Coil Diameter 100 mm 4 in Voice Coil winding material Copper wire Suspension Triple-roll. Polycotton Cone Complex Composite THIELE SMALL PARAMETERS Fs 29 Hz Re 4.9 Ohm Sd 0.166 sq. mt. 257.30 sq. in. Qms 22.0 Qes 0.38 Qts 0.37 Vas 305 It. 10.77 cuff Mms 380 gr. 0.83 lb BI 30.0 Tm Linear Mathematical Xmax +/- 15 mm +/- 0.59 in Le 1kHz 2.80 mH Ref. Efficiency 1W 1m half space 2% Overall diameter 545mm 21.46 in N.of mounting holes and bolt Mounting holes diameter 8.5 mm 0.33 in Bolt circle diameter 520mm 20.47 in Front mount baffle cutout diameter 492 mm 19.37 in Rear mount baffle cutout diameter 490 mm 19.29 in Total depth 245 mm 9.64 in Flange and gasket thickness 18 mm 0.7 in Net weight 11.6 kg 25.5 Ib Shipping weight 13.1 Kg 28.8 lb CardBoard Packaging dimensions 570x570x290 mm 22.4x22.4x1 1.4 in