Transducer Size (Millimeters)254
DC Resistance2.71
Resonant Frequency28.27
Half Space Sensitivity90.02
Rated Noise Power120
Test Spectrum Bandwidth20Hz - 20kHz

Transducer Size (Millimeters)254
DC Resistance2.71 Ω±5.0%
Resonant Frequency28.27 Hz15%
Half Space Sensitivity @ 2.83V90.02 dB±1.01
Sensitivity @ 1W/1m86.5 dB±1.01
Rated Noise Power (IEC 268-5 18.1)120 W
Test Spectrum Bandwidth20Hz - 20kHz 12 dB/Oc
Effective Piston Area346.4 cm2
Moving Mass93.8 g
Motor Force Factor10.07 T•m
Voice Coil Inner Diameter51.32 mm
Gap Height8 mm
Maximum Linear Excursion12.3 mm
Ferrofluid Type
Minimum Impedance3.57 Ω±7.5%
Voice Coil Inductance0.5 mH
Mechanical Q Factor9.83
Electrical Q Factor0.45
Total Q Factor0.43
Ratio66.37 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance337.9 μm/N
Effective Cone Diameter21 cm
Motor Efficiency Factor37.4 (T•m2)/Ω
Voice Coil Former MaterialGSV
Transducer Mass6.9 Kg
Equivalent Volume56.93 L

This member of the XXLS product family has all the design features suitable for a high performance, high excursion subwoofer driver. The motor features a double ferrite magnet motor, supporting high excursion, and aluminium shorting rings and pole extenders, lowering and linearizing the inductance of the overhung voice coil. The light & stiff composite paper cone is vented under the dust cap, to reduce air compression. The suspension system features a low-creep rubber surround, and a nomex spider, ensuring long-term reliability under high power conditions. The product also features a rigid cast aluminium basket.