[. . . ] [. . . ] 20HZ~1. 8KHZ Woofer Cone Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Polypropylene Woofer Magnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ferrite Woofer Basket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alumina Woofer Surround . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rubber Sealed/Acoustic Suspension OPTIMUM Enclosure Airspace (Unfilled) = 1. 38 ft3 Enclosure Airspace (Filled) =1. 10 ft3 Fc =51. 3 HZ Thiele Small Parameters Outside Dia Mounting Hole Mounting Depth Sensitivity Max. Peak Music Continuous Power Nominal Impedance Re DC Imp (± 10%) Le V. C. Length Air Gap Piston Diameter Sd Vas Fs Qts Qes Mms Mmd Rms BI Speaker Displacement Xmax Magnet Weight 12" 294mm 168mm 89 dB 500W*2 250W*2 1. 9 Ohm (paralleled) 3. 7 Ohm 1. 15 mh@1khz 2" 30mm 8mm 260mm 0. 0531 sqm 68. 119 L (paralleled) 38. 025 HZ(paralleled) 0. 4058 (paralleled) 0. 433 (paralleled) 114. 934 g (paralleled) 107. 29 g (paralleled) 3. 968 kgs-1(paralleled) 10. 98 TM (paralleled) 58. 4 CM3(paralleled) 11mm 85. 5 oz Vented/Bass Reflex MAXIMUM FLAT Enclosure Airspace = 2. 64 ft3 Fb =38 HZ F3 =37 HZ Port Size = 3" I. D. [. . . ] [. . . ]