Transducer Size (Millimeters)203.2
DC Resistance4.04
Resonant Frequency40.5
Half Space Sensitivity85.74
Rated Noise Power200
Test Spectrum Bandwidth40Hz-500Hz

Transducer Size (Millimeters) 203.2
DC Resistance 4.04 Ω±5.0%
Resonant Frequency 40.5 Hz15%
Half Space Sensitivity @ 2.83V85.74 dB±1.01
Sensitivity @ 1W/1m84.7 dB±1.01
Rated Noise Power (IEC 268-5 18.1)200 W
Test Spectrum Bandwidth 40Hz-500Hz 12 dB/Oc
Effective Piston Area 240.5 cm2
Moving Mass 63 g
Motor Force Factor 10.61 T•m
Voice Coil Inner Diameter 35.55 mm
Gap Height 8 mm
Maximum Linear Excursion 9.1 mm
Ferrofluid Type
Minimum Impedance 6.27 Ω±7.5%
Voice Coil Inductance 1.02 mH
Mechanical Q Factor 5.25
Electrical Q Factor 0.58
Total Q Factor 0.52
Ratio 78.03 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 245.2 μm/N
Effective Cone Diameter 17.5 cm
Motor Efficiency Factor 27.8 (T•m2)/Ω
Voice Coil Former Material ASL
Transducer Mass 2.16 Kg
Equivalent Volume 19.93 L

This is a 8inch 4ohm subwoofer, a member of the new SBS product family. This driver features a coated paper cone, with a ferrite magnet and steel basket. Is designed to be a long excursion and high performance driver, . The driver effective frequency response is between 40Hz to 500Hz.