Transducer Size (Millimeters)114.3
DC Resistance3.26
Resonant Frequency88.8
Half Space Sensitivity85.45
Rated Noise Power20
Test Spectrum Bandwidth50-4.5K

Transducer Size (Millimeters)114.3
DC Resistance3.26 Ω±5.0%
Resonant Frequency88.8 Hz15%
Half Space Sensitivity @ 2.83V85.45 dB±1.01
Sensitivity @ 1W/1m81.8 dB±1.01
Rated Noise Power (IEC 268-5 18.1)20 W
Test Spectrum Bandwidth50-4.5K 12 dB/Oc
Effective Piston Area54.8 cm2
Moving Mass9.3 g
Motor Force Factor4.39 T•m
Voice Coil Inner Diameter25.73 mm
Gap Height5 mm
Maximum Linear Excursion3.2 mm
Ferrofluid Type
Minimum Impedance3.42 Ω±7.5%
Voice Coil Inductance0.32 mH
Mechanical Q Factor2.96
Electrical Q Factor0.88
Total Q Factor0.68
Ratio131.36 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance345 μm/N
Effective Cone Diameter8.35 cm
Motor Efficiency Factor5.9 (T•m2)/Ω
Voice Coil Former MaterialAL
Transducer Mass0.22 Kg
Equivalent Volume1.65 L

This 4.5 inch 4 ohm transducer member of the GBS family provides a very slim woofer capable of large excursion. An anodized Al cone helps to extends the piston bands in the working range.A highly optimized NdFeB and unique suspension layout combine to give a cost effective solution in a previously unavailable package.