Transducer Size (Millimeters)457.2
DC Resistance5.32
Resonant Frequency32.16
Half Space Sensitivity94.73
Rated Noise Power600
Test Spectrum Bandwidth40Hz-400Hz

Transducer Size (Millimeters)457.2
DC Resistance5.32 Ω±5.0%
Resonant Frequency32.16 Hz15%
Half Space Sensitivity @ 2.83V94.73 dB±1.01
Sensitivity @ 1W/1m94.5 dB±1.01
Rated Noise Power (IEC 268-5 18.1)600 W
Test Spectrum Bandwidth40Hz-400Hz 12 dB/Oc
Effective Piston Area1231.7 cm2
Moving Mass156 g
Motor Force Factor21.45 T•m
Voice Coil Inner Diameter75.75 mm
Gap Height8 mm
Maximum Linear Excursion6 mm
Ferrofluid Type
Minimum Impedance7.66 Ω±7.5%
Voice Coil Inductance1.64 mH
Mechanical Q Factor6.31
Electrical Q Factor0.36
Total Q Factor0.34
Ratio93.49 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance157 μm/N
Effective Cone Diameter39.6 cm
Motor Efficiency Factor86.6 (T•m2)/Ω
Voice Coil Former MaterialGSV
Transducer Mass7.1 Kg
Equivalent Volume334.5 L

This 18 inch 8 ohm speaker features a FEA optimized ferrite magnet motor, a 3 inch high-temperature voice coil, the yoke with vents can cool magnet system, and a high strength stamped steel frame. Kevlar loaded non-pressed paper cone to help dampen and control cone resonance.The multi-roll surround and spider have been optimized to reduce distortion over the excursion range of this transducer.