Transducer Size (Millimeters)152.4
DC Resistance5.85
Resonant Frequency42.85
Half Space Sensitivity87.46
Rated Noise Power70
Test Spectrum Bandwidth40Hz - 3kHz

Transducer Size (Millimeters)152.4
DC Resistance5.85 Ω±5.0%
Resonant Frequency42.85 Hz15%
Half Space Sensitivity @ 2.83V87.46 dB±1.01
Sensitivity @ 1W/1m86.7 dB±1.01
Rated Noise Power (IEC 268-5 18.1)70 W
Test Spectrum Bandwidth40Hz - 3kHz 12 dB/Oc
Effective Piston Area143.1 cm2
Moving Mass17.3 g
Motor Force Factor7.7 T•m
Voice Coil Inner Diameter32.41 mm
Gap Height6 mm
Maximum Linear Excursion5.6 mm
Ferrofluid Type
Minimum Impedance6.67 Ω±7.5%
Voice Coil Inductance0.18 mH
Mechanical Q Factor2.18
Electrical Q Factor0.46
Total Q Factor0.38
Ratio112.77 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance795.6 μm/N
Effective Cone Diameter13.5 cm
Motor Efficiency Factor10.1 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass1.64 Kg
Equivalent Volume22.9 L

This 6.5 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 driver employs a phase plug for low compression and frequency response shaping without the use of a dust cap. 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.