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 Resistance 5.32 Ω±5.0%
Resonant Frequency 32.16 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 Bandwidth 40Hz-400Hz 12 dB/Oc
Effective Piston Area 1231.7 cm2
Moving Mass 156 g
Motor Force Factor 21.45 T•m
Voice Coil Inner Diameter 75.75 mm
Gap Height 8 mm
Maximum Linear Excursion 6 mm
Ferrofluid Type
Minimum Impedance 7.66 Ω±7.5%
Voice Coil Inductance 1.64 mH
Mechanical Q Factor 6.31
Electrical Q Factor 0.36
Total Q Factor 0.34
Ratio 93.49 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 157 μm/N
Effective Cone Diameter 39.6 cm
Motor Efficiency Factor 86.6 (T•m2)/Ω
Voice Coil Former Material GSV
Transducer Mass 7.1 Kg
Equivalent Volume 334.5 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.