The FAITAL PRO 12FH520-8 is a 12-inch professional woofer designed for high-quality audio applications. This woofer is known for its low distortion, high effective bandwidth product (EBP), outstanding sensitivity, and great power handling, making it one of the most advanced woofers in the Pro Audio industry. || NOMINAL SPECIFICATIONS || Nominal Diameter : 300 mm (12 in) || Overall Diameter : 316 mm (12.44 in) || Bolt Circle Diameter : 298.5 mm (11.75 in) || Baffle Cutout Diameter : 284 mm (11.18 in) || Depth : 155.75 mm (6.13 in) || Flange and Gasket Thickness : 12.5 mm (0.49 in) || Net Weight : 4.2 kg (9.3 lb) || Shipping Box (Single Carton Box) : 350 x 346 x 216 mm (13.8 x 13.6 x 8.5 in) || Shipping Weight : 5 kg (11.0 lb) || || TECHNICAL PARAMETERS || Nominal Impedance : 8 Ohm || Minimum Impedance : 6.3 Ohm || AES Power Handling (1) : 600 W || Maximum Power Handling (2) : 1200 W || Sensitivity (1W/1m) : 98 dB || Frequency Range : 50÷4000 Hz || Voice Coil Diameter : 77 mm (3 in) || Winding Material : Al || Former Material : Glass Fiber || || TECHNICAL PARAMETERS || Winding Depth : 18.5 mm (0.71 in) || Magnetic Gap Depth : 12 mm (0.47 in) || Flux Density : 1.1 T || Magnet : Neodymium Slug || Basket Material : Aluminum || Demodulation : Aluminum Ring || Cone Surround (3) : Triple Roll || NET Air Volume filled by Loudspeaker : 2.4 dm^3 (0.085 ft^3) || Spider Profile : 1x variable height waves || || THIELE AND SMALL PARAMETERS || Fs : 50 Hz || Re : 5.1 Ohm || Qes : 0.3 || Qms : 11.1 || Qts : 0.29 || Vas : 73.7 dm^3 (2.60 ft^3) || Sd : 540 cm^2 (83.70 in^2) || Xmax (4) : 7.25 mm || Xdamage (5) : 19.5 mm || Mms : 56.0 g || Bl : 17.3 N/A || Le : 0.74 mH || Mmd : 41.8 g || Cms : 0.18 mm/N || Rms : 1.6 kg/s || Eta Zero : 2.98 % || EBP : 167 Hz || || Brand : FAITAL PRO || Model Number : 12FH520-8 | 12FH520 || UPC : 810130951154 || PART NUMBER (P/N) Push Terminals - 8 Ohm Version : 3003973 || NOTES || (1) 2 Hours Test According to AES 2-1984 Rev. 2003 || (2) Maximum power is defined as 3dB greater than nominal power || (3) Treated Polycotton || (4) Xmax= [(winding depth - magnetic gap depth)/2] + (magnetic gap depth/3) || (5) Maximum excursion before permanent damage