Full Range
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.
MECHANICAL 2D DRAWING
Revision:3 | Date: 2014-10-11
PLS-65F25AL04-04
SPECIFICATIONS
DC Resistance Revc Ω 3.61 ±5.0% Moving Mass Mms g 2
Minimum Impedance Zmin Ω 4.33 ±7.5% Suspension Compliance Cms um/N 864
Voice Coil Inductance Le mH 0.03 – Effective Cone Diameter D cm 5.2
Resonant Frequency fs Hz 120.6 15% Effective Piston Area Sd cm2 21.2
Mechanical Q Factor Qms – 4.14 – Equivalent Volume Vas L 0.55
Electrical Q Factor Qes – 0.82 – Motor Force Factor BL T•m 2.53
Total Q Factor Qts – 0.69 – Motor Efficiency Factor β (T•m2)/Ω 1.8
Ratio fs/Qts – 176.05 – Voice Coil Former Material VCfm – ASV
Half Space Sensitivity dB@2.83V/1m dB 85.59 ±1.01 Voice Coil Inner Diameter VCd mm 25.73
Sensitivity 1W/1m dB 82.9 ±1.01 Gap Height Gh mm 3
Rated Noise Power (IEC 268-5 18.1) P W 25 – Maximum Linear Excursion Xmax mm 1.7
Test Spectrum Bandwidth 12 dB/Oct 100Hz~20KHz – Ferrofluid Type FF –
Energy Bandwidth Product EBP (1/Qes)•fs – Transducer Size – – 2.5 in
– Transducer Mass – Kg 0.34
FREQUENCY & IMPEDANCE RESPONSE
© 2015 Tymphany HK Ltd. | Address: 1307-8 Dominion Centre, 43-59 Queen's Rd. East., Wanchai, Hong Kong | Email: sales@tymphany.com
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