Transducer Size (Millimeters)101.6
DC Resistance3.18
Resonant Frequency64.6
Half Space Sensitivity89.94
Rated Noise Power30
Test Spectrum Bandwidth55Hz-8KHz

Transducer Size (Millimeters)101.6
DC Resistance3.18 Ω±5.0%
Resonant Frequency64.6 Hz15%
Half Space Sensitivity @ 2.83V89.94 dB±1.01
Sensitivity @ 1W/1m87.2 dB±1.01
Rated Noise Power (IEC 268-5 18.1)30 W
Test Spectrum Bandwidth55Hz-8KHz 12 dB/Oc
Effective Piston Area59.5 cm2
Moving Mass6 g
Motor Force Factor4.17 T•m
Voice Coil Inner Diameter25.86 mm
Gap Height4 mm
Maximum Linear Excursion3.3 mm
Ferrofluid TypeN/A
Minimum Impedance4.23 Ω±7.5%
Voice Coil Inductance0.17 mH
Mechanical Q Factor2.92
Electrical Q Factor0.45
Total Q Factor0.39
Ratio166.07 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)144.77
Suspension Compliance1005.2 μm/N
Effective Cone Diameter8.7 cm
Motor Efficiency Factor5.5 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass0.6 Kg
Equivalent Volume4.99 L

This is 4 inch 4 ohm,paper cone with rubber surround woofer, it have low resonant frequency performance, a high power voice coil suspended in a ferrite magnet motor, a plastic basket is designed to be a cost-effective high performance driver .