Free Air Resonance (Fs): 25.24 Hz

Electrical “Q” (Qes): 0.432

Mechanical “Q” (Qms): 6.336

Total Speaker “Q” (Qts): 0.405

Equivalent Compliance (Vas): 1.783 cu. ft. / 50.46 liters

One-Way, Linear Excursion (Xmax)*: 0.375 in. / 9.5 mm

Reference Efficiency (no): 0.180%

Efficiency (1W/1m)**: 84.53 dB SPL

Effective Piston Area (Sd): 53.522 sq. in. / 0.0345 sq. m.

DC Resistance (Re): 4.086 ohm

Nominal Impedance (Znom): 4 ohm

Thermal Power Handling (Pt): 300W

Driver Displacement: 0.71 liters

Net Weight: 3.54 kg

Nominal Diameter 250 mm

Overall diameter 267mm

Mounting hole diameter 230 mm

Bolt hole circle 246.5mm

Magnet diameter 115mm

Mounting depth 110 mm