12-in Woofer w/Hypervented neo mid-bass design w/a linear frequency response & very high efficiency

To get this performance the magnetic structure use a high flux neo disc & the cone assembly a fibre loaded exponential shape along w/a high excursion triple roll, constant geometry surround.The fiberglass former & aluminium voice coil provide a very high power handling maintaining a light mass & a proper Q factor for bass alignment. Ideal where is required extremely high power handling, very high efficiency & perfect linearity.Is the ideal 12-in mid-bass woofer for reference high fidelity, high performance midbass application in compact 2 way system.PART NUMBER: 11100112 4-inch, fibreglass inside/outside aluminium voice coil 2000W continuous program power handling 98.5 dB Sensitivity 50 Hz - 2 kHz Frequency range Dual-forced air ventilation for minimum power compression Triple roll surround & exponential cone geometry Nominal Diameter:300 / 12 mm/inch Rated Impedance:8 Ohms Program Power:2000 W AES Power handling capacity:1000 W AES Sensitivity:98.5 dB Frequency Range:50 Hz / 2000 Hz Effective Piston Diameter:260 / 10.2 mm/inch Max Excursion Before Damage peak to peak:53/ 2.08 mm/inch Minimum Impedance:6.6 O Voice Coil Diameter:100 / 4.0 mm/inch Voice Coil Material:Aluminium Voice Coil Winding Depth:20 / 0.78 mm/inch Number of layers:2 Kind of layer:inside / outside Top Plate Thickness:12 / 0.47 mm/inch Cone Material:No pressed pulp Cone Design:Curved Surround Material:Polycotton Surround Design:Triple roll THIELE/SMALL PARAMETERS Resonance frequency:52 Hz DC resistance:5.0O Mechanical factor:6.0 Electrical factor:0.21 Total factor:0.20 BL Factor:23.5 T m Effective Moving Mass:72.5 g Equivalent Cas air load:53 liters Effective piston area:0.053 m Max. linear excursion mathematical:7.3 mm Voice - coil inductance at 1kHz:1.2 mH Half-space efficiency:3.31 Percent Overall Diameter:320 / 12.6 mm/inch Bolt Circle Diameter:293-304 / 11.5-12 mm/inch Bolt Hole Diameter:6.5 / 0.3 mm/inch Front Mount Baffle Cut-out:282 / 11.1 mm/inch Rear Mount Baffle Cut-out:284 / 11.2 mm/inch Depth:125.5 / 4.9 mm/inch Volume occupied by the driver:2.9 / 0.098 liters/ft cubed Net Weight:7.7 / 16.9 kg/lbs Shipping weight:8.7 / 19.1 kg/lbs