JL Audio 12W3v3-8 12inch Subwoofer Driver (8ohm)

Product features

• Free Air Resonance (Fs): 28.28 Hz
  Electrical "Q" (Qes): 0.553
  Mechanical "Q" (Qms): 6.936
  Total Speaker "Q" (Qts): 0.512
  Equivalent Compliance (Vas): 2.729 cu. ft./77.29 liters
  One-Way, Linear Excursion (Xmax)*: 0.510 in./13.0 mm
  Reference Efficiency (no): 0.303%
  Efficiency (1W/1m)**: 87.02 dB SPL
  Effective Piston Area (Sd): 80.600 sq. in./0.0520 sq. m.
  DC Resistance (Re): 7.310 ohm
  Nominal Impedance (Znom): 8 ohm
  Thermal Power Handling (Pt): 500W
  Driver Displacement: 0.071 cu. ft./2.01 liters
  Net Weight: 14.50 lbs./6.58 kg