Transducer Size (Millimeters)133.35
DC Resistance3.16
Resonant Frequency77.46
Half Space Sensitivity89.44
Rated Noise Power20
Test Spectrum Bandwidth60Hz-10KHz

Transducer Size (Millimeters)133.35
DC Resistance3.16 Ω±5.0%
Resonant Frequency77.46 Hz15%
Half Space Sensitivity @ 2.83V89.44 dB±1.01
Sensitivity @ 1W/1m86.8 dB±1.01
Rated Noise Power (IEC 268-5 18.1)20 W
Test Spectrum Bandwidth60Hz-10KHz 12 dB/Oc
Effective Piston Area60.8 cm2
Moving Mass7.6 g
Motor Force Factor5.42 T•m
Voice Coil Inner Diameter25.86 mm
Gap Height4 mm
Maximum Linear Excursion3.3 mm
Ferrofluid Type
Minimum Impedance4.35 Ω±7.5%
Voice Coil Inductance0.15 mH
Mechanical Q Factor2.44
Electrical Q Factor0.4
Total Q Factor0.34
Ratio225.82 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance554.4 μm/N
Effective Cone Diameter8.8 cm
Motor Efficiency Factor9.3 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass1.06 Kg
Equivalent Volume2.62 L

This 4 ohm 5.25 inch driver is a member of the high performance PL 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 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 a coated paper cone, offering a unique visual and acoustic experience.