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 Resistance4.04 Ω±5.0%
Resonant Frequency40.5 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 Bandwidth40Hz-500Hz 12 dB/Oc
Effective Piston Area240.5 cm2
Moving Mass63 g
Motor Force Factor10.61 T•m
Voice Coil Inner Diameter35.55 mm
Gap Height8 mm
Maximum Linear Excursion9.1 mm
Ferrofluid Type
Minimum Impedance6.27 Ω±7.5%
Voice Coil Inductance1.02 mH
Mechanical Q Factor5.25
Electrical Q Factor0.58
Total Q Factor0.52
Ratio78.03 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance245.2 μm/N
Effective Cone Diameter17.5 cm
Motor Efficiency Factor27.8 (T•m2)/Ω
Voice Coil Former MaterialASL
Transducer Mass2.16 Kg
Equivalent Volume19.93 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.