Transducer Size (Millimeters)133.35
DC Resistance5.49
Resonant Frequency69.18
Half Space Sensitivity89.54
Rated Noise Power50
Test Spectrum Bandwidth20Hz-20KHz

Transducer Size (Millimeters) 133.35
DC Resistance 5.49 Ω±5.0%
Resonant Frequency 69.18 Hz15%
Half Space Sensitivity @ 2.83V89.54 dB±1.01
Sensitivity @ 1W/1m88.8 dB±1.01
Rated Noise Power (IEC 268-5 18.1)50 W
Test Spectrum Bandwidth 20Hz-20KHz 12 dB/Oc
Effective Piston Area 89.9 cm2
Moving Mass 8.3 g
Motor Force Factor 6.4 T•m
Voice Coil Inner Diameter 25.73 mm
Gap Height 6 mm
Maximum Linear Excursion 2.2 mm
Ferrofluid Type
Minimum Impedance 6.71 Ω±7.5%
Voice Coil Inductance 0.33 mH
Mechanical Q Factor 1.79
Electrical Q Factor 0.49
Total Q Factor 0.38
Ratio 181.1 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 635.4 μm/N
Effective Cone Diameter 10.7 cm
Motor Efficiency Factor 7.5 (T•m2)/Ω
Voice Coil Former Material ASV
Transducer Mass 0.82 Kg
Equivalent Volume 7.22 L

This 8 ohm 5.25 inch driver is a member of the high performance HDS family. A powerful ferrite magnet system is coupled to a finite element analysis designed suspension system, containing both a linear spider design and a rubber surround. The long-throw voice coil ensures linear high excursion performance, needed for signal clarity. The cone necks are vented so as to reduce air compression effects under high excursion conditions. The cast aluminium basket offers structural rigidity, heat sinking capacity for the motor, and additional air venting under the spider so as to again reduce air compression effects. The cone in this model is nomex based, offering a unique visual and acoustic experience.