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 Resistance 2.51 Ω±5.0%
Resonant Frequency 21.55 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 Bandwidth 20Hz - 4kHz 12 dB/Oc
Effective Piston Area 483.1 cm2
Moving Mass 131.4 g
Motor Force Factor 10.58 T•m
Voice Coil Inner Diameter 51 mm
Gap Height 8 mm
Maximum Linear Excursion 12.3 mm
Ferrofluid Type N/A
Minimum Impedance 3.36 Ω±7.5%
Voice Coil Inductance 0.53 mH
Mechanical Q Factor 10.83
Electrical Q Factor 0.4
Total Q Factor 0.39
Ratio 55.97 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)55
Suspension Compliance 415.1 μm/N
Effective Cone Diameter 24.8 cm
Motor Efficiency Factor 44.5 (T•m2)/Ω
Voice Coil Former Material GSV
Transducer Mass 6.4 Kg
Equivalent Volume 136.04 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.