The FAITAL PRO 8PR155-8 is an 8-inch Mid-bass / Midrange Loudspeaker that is part of the professional series, designed for high power and high efficiency in professional audio applications. This speaker is known for its lower distortion and flat response across its entire frequency range, thanks to its aluminum demodulation ring. It's highly efficient with a sensitivity of 97dB SPL and a wide frequency range from 80Hz to 6.3kHz, making it suitable for mid-bass or midrange applications in PA speaker systems, home hi-fi, etc. || NOMINAL SPECIFICATIONS || Nominal Diameter : 200 mm (8 in) || Overall Diameter : 8.81 / 8.18 in || Bolt Circle Diameter : 8.27 in || Baffle Cutout Diameter : 7.20 in || Depth : 3.88 in || Flange and Gasket Thickness : 0.43 in || Net Weight : 9.5 lb || Shipping Box (Single Carton Box) : 9.3 x 9.3 x 6.1 in || Shipping Weight : 4.6 kg (10.1 lb) || || TECHNICAL PARAMETERS || Nominal Impedance : 8 Ohm || Minimum Impedance : 6.3 Ohm || AES Power Handling (1) : 200 W || Maximum Power Handling (2) : 400 W || Sensitivity (1W/1m) : 97 dB || Frequency Range : 80÷6300 Hz || Voice Coil Diameter : 52 mm (2 in) || Winding Material : Al || Former Material : Glass Fiber || Winding Depth : 9.8 mm (0.39 in) || Magnetic Gap Depth : 8 mm (0.31 in) || Flux Density : 1.3 T || Magnet : Ferrite Ring || Basket Material : Aluminum || Demodulation : Aluminum Ring || Cone Surround (3) : Triple Roll || NET Air Volume filled by Loudspeaker : 1.06 dm^3 (0.037 ft^3) || Spider Profile : 1x variable height waves || || THIELE AND SMALL PARAMETERS || Fs : 85 Hz || Re : 5.3 Ohm || Qes : 0.39 || Qms : 8.8 || Qts : 0.37 || Vas : 9.4 dm^3 (0.33 ft^3) || Sd : 217 cm^2 (33.67 in^2) || Xmax (4) : 3.57 mm || Xdamage (5) : 10.65 mm || Mms : 24.5 g || Bl : 13.4 N/A || Le : 0.41 mH || Mmd : 20.9 g || Cms : 0.14 mm/N || Rms : 1.5 kg/s || Eta Zero : 1.45 % || EBP : 218 Hz || || Brand : FAITAL PRO || Model Number : 8PR155-8 | 8PR155 || UPC : 810130951420 || PART NUMBER (P/N) Faston Terminals - 8 Ohm Version : 02004172 || 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