Free Air Resonance (Fs): 25.0 Hz

Electrical “Q” (Qes): 0.480

Mechanical “Q” (Qms): 7.100

Total Speaker “Q” (Qts): 0.450

Equivalent Compliance (Vas): 79.9 liters

One-Way, Linear Excursion (Xmax)*: 16.5 mm

Reference Efficiency (no): 0.250%

Efficiency (1W/1m)**: 85.9 dB SPL

Effective Piston Area (Sd): 77.8 sq. in. / 0.0502 sq. m.

DC Resistance (Re): 6.75 ohm

Nominal Impedance (Znom): 2x4 ohm

Thermal Power Handling (Pt): 600W

Driver Displacement: 2.5 liters

Net Weight: 8.8 kg

Nominal Diameter 305 mm

Overall diameter 317.5mm

Mounting hole diameter 279.5 mm

Bolt hole circle 304mm

Magnet diameter 169mm

Mounting depth 193mm