Free Air Resonance (Fs): 30.6 Hz
Electrical “Q” (Qes): 0.578
Mechanical “Q” (Qms): 7.647
Total Speaker “Q” (Qts): 0.537
Equivalent Compliance (Vas): 36.1 liters
One-Way, Linear Excursion (Xmax)*: 23 mm
Reference Efficiency (no): 0.171%
Efficiency (1W/1m)**: 84.3 dB SPL
Effective Piston Area (Sd): 59.8 sq. in. / 0.0386 sq. m.
DC Resistance (Re): 2.75 ohm
Nominal Impedance (Znom): 3 ohm
Thermal Power Handling (Pt): 750W
Driver Displacement: 2.5 liters
Net Weight: 13.6 kg

Nominal Diameter 254 mm
Overall diameter 267mm
Mounting hole diameter 222 mm
Bolt hole circle 237mm
Magnet diameter 166mm
Mounting depth 203mm