Transducer Size (Millimeters)203.2
DC Resistance3.52
Resonant Frequency41.8
Half Space Sensitivity87.05
Rated Noise Power150
Test Spectrum Bandwidth40Hz-500Hz

Transducer Size (Millimeters)203.2
DC Resistance3.52 Ω±5.0%
Resonant Frequency41.8 Hz15%
Half Space Sensitivity @ 2.83V87.05 dB±1.01
Sensitivity @ 1W/1m84.5 dB±1.01
Rated Noise Power (IEC 268-5 18.1)150 W
Test Spectrum Bandwidth40Hz-500Hz 12 dB/Oc
Effective Piston Area221.7 cm2
Moving Mass66.8 g
Motor Force Factor12 T•m
Voice Coil Inner Diameter35.5 mm
Gap Height8 mm
Maximum Linear Excursion5.2 mm
Ferrofluid Type
Minimum Impedance4.49 Ω±7.5%
Voice Coil Inductance1.81 mH
Mechanical Q Factor4.63
Electrical Q Factor0.43
Total Q Factor0.39
Ratio106.63 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance217 μm/N
Effective Cone Diameter16.8 cm
Motor Efficiency Factor40.9 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass2.28 Kg
Equivalent Volume15.12 L

This 8 inch 4 ohm transducer member of the GBS family provides a very slim woofer capable of large excursion. A highly optimized ferrite motor and unique suspension layout combine to give a cost effective solution in a previously unavailable package.