Transducer Size (Millimeters)63.5
DC Resistance3.61
Resonant Frequency120.6
Half Space Sensitivity85.59
Rated Noise Power25
Test Spectrum Bandwidth100Hz~20KHz

Transducer Size (Millimeters)63.5
DC Resistance3.61 Ω±5.0%
Resonant Frequency120.6 Hz15%
Half Space Sensitivity @ 2.83V85.59 dB±1.01
Sensitivity @ 1W/1m82.9 dB±1.01
Rated Noise Power (IEC 268-5 18.1)25 W
Test Spectrum Bandwidth100Hz~20KHz 12 dB/Oc
Effective Piston Area21.2 cm2
Moving Mass2 g
Motor Force Factor2.53 T•m
Voice Coil Inner Diameter25.73 mm
Gap Height3 mm
Maximum Linear Excursion1.7 mm
Ferrofluid Type
Minimum Impedance4.33 Ω±7.5%
Voice Coil Inductance0.03 mH
Mechanical Q Factor4.14
Electrical Q Factor0.82
Total Q Factor0.69
Ratio176.05 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance864 μm/N
Effective Cone Diameter5.2 cm
Motor Efficiency Factor1.8 (T•m2)/Ω
Voice Coil Former MaterialASV
Transducer Mass0.34 Kg
Equivalent Volume0.55 L

This 2.5 inch 4 ohm member of the PLS family sets a high standard for compact full range drivers intended for applications such as television soundbars and compact music systems. Design features in this family include a stiff steel basket with venting under the spider to aid cooling of the motor, a ferrite magnet motor with copper cap to lower coil inductance, providing low distortion at low frequencies and extended high frequency response. A black anodized aluminium cone is employed, along with a black anodized aluminium dust cap coupled directly to the voice coil. Additionally, the cones come equipped with special-designed large roll rubber surrounds, which allow for a dynamic linear response at high excursion.