Transducer Size (Millimeters)304.8
DC Resistance2.51
Resonant Frequency21.55
Half Space Sensitivity88.57
Rated Noise Power120
Test Spectrum Bandwidth20Hz - 4kHz

Transducer Size (Millimeters)304.8
DC Resistance2.51 Ω±5.0%
Resonant Frequency21.55 Hz15%
Half Space Sensitivity @ 2.83V88.57 dB±1.01
Sensitivity @ 1W/1m84.8 dB±1.01
Rated Noise Power (IEC 268-5 18.1)120 W
Test Spectrum Bandwidth20Hz - 4kHz 12 dB/Oc
Effective Piston Area483.1 cm2
Moving Mass131.4 g
Motor Force Factor10.58 T•m
Voice Coil Inner Diameter51 mm
Gap Height8 mm
Maximum Linear Excursion12.3 mm
Ferrofluid TypeN/A
Minimum Impedance3.36 Ω±7.5%
Voice Coil Inductance0.53 mH
Mechanical Q Factor10.83
Electrical Q Factor0.4
Total Q Factor0.39
Ratio55.97 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)55
Suspension Compliance415.1 μm/N
Effective Cone Diameter24.8 cm
Motor Efficiency Factor44.5 (T•m2)/Ω
Voice Coil Former MaterialGSV
Transducer Mass6.4 Kg
Equivalent Volume136.04 L

This 12 inch 4 ohm 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 Aluminium 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.