Transducer Size (Millimeters)133.35
DC Resistance5.88
Resonant Frequency69.08
Half Space Sensitivity88
Rated Noise Power60
Test Spectrum Bandwidth20Hz - 20kHz

Transducer Size (Millimeters)133.35
DC Resistance5.88 Ω±5.0%
Resonant Frequency69.08 Hz15%
Half Space Sensitivity @ 2.83V88 dB±1.01
Sensitivity @ 1W/1m87.3 dB±1.01
Rated Noise Power (IEC 268-5 18.1)60 W
Test Spectrum Bandwidth20Hz - 20kHz 12 dB/Oc
Effective Piston Area83.3 cm2
Moving Mass9.4 g
Motor Force Factor6.65 T•m
Voice Coil Inner Diameter25.73 mm
Gap Height6 mm
Maximum Linear Excursion3.5 mm
Ferrofluid Type
Minimum Impedance6.78 Ω±7.5%
Voice Coil Inductance0.24 mH
Mechanical Q Factor1.8
Electrical Q Factor0.55
Total Q Factor0.42
Ratio165.27 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance561.9 μm/N
Effective Cone Diameter10.3 cm
Motor Efficiency Factor7.5 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass1.06 Kg
Equivalent Volume5.48 L

This 5.25 inch 8 ohm 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 motor contains an aluminium shorting ring, which reduces coil inductance, thus providing both extended frequency response performance and reduced distortion. The long-throw voice coil ensures linear high excursion performance, needed for signal clarity. The cone necks are vented to reduce air compression effects under high excursion conditions. The cast aluminium basket offers structural rigidity, heat sinking for the motor, and additional air venting under the spider so to again reduce air compression effects. The cone in this model is nomex based, offering a unique visual and acoustic experience.