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 Resistance 3.26 Ω±5.0%
Resonant Frequency 88.8 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 Bandwidth 50-4.5K 12 dB/Oc
Effective Piston Area 54.8 cm2
Moving Mass 9.3 g
Motor Force Factor 4.39 T•m
Voice Coil Inner Diameter 25.73 mm
Gap Height 5 mm
Maximum Linear Excursion 3.2 mm
Ferrofluid Type
Minimum Impedance 3.42 Ω±7.5%
Voice Coil Inductance 0.32 mH
Mechanical Q Factor 2.96
Electrical Q Factor 0.88
Total Q Factor 0.68
Ratio 131.36 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 345 μm/N
Effective Cone Diameter 8.35 cm
Motor Efficiency Factor 5.9 (T•m2)/Ω
Voice Coil Former Material AL
Transducer Mass 0.22 Kg
Equivalent Volume 1.65 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.