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JENSEN C15N 50WATT 8 OHM 15" CERAMIC MAGNET SPEAKER. USED IN MANY VINTAGE AMPS; AMPEG B15, GEMINI II AND MORE.
General Characteristics
Nominal Overall Diameter 385 mm 15 in
Nominal Voice Coil Diameter 38 mm 1.5 in
Magnet Weight 810 g 28.5 oz
Overall Weight 9.05 lbs
Flux Density 1.00 T
Thiele-Small Parameters
Voice Coil DC Resistance RE 6.5 Ω
Resonance Frequency ƒS 73.0 Hz
Mechanical Q Factor QMS 7.34
Electrical Q Factor QES 1.24
Total Q Factor QTS 1.06
Mechanical Moving Mass MMS 40.6 g
Mechanical Compliance CMS 117.0 µm/N
Force Factor BxL 9.93 Wb/m
Equivalent Acoustic Volume VAS 93.4 lt.
Maximum Linear Displacement XMAX 1.0 mm
Reference Efficiency nO 2.84 %
Diaphragm Area SD 754.7 cm2
Losses Electrical Resistance RES 39.0 Ω
Voice Coil Inductance @ 1kHz LE 0.93 mH
Constructive Characteristics
Magnet Ferrite
Voice Coil Winding Copper
Voice Coil Former Kapton
Cone Paper
Surround Integrated Paper
Dust Dome Solid Paper
Basket Pressed Sheet Steel
Electrical Characteristics
Nominal Impedance 8 Ω
Rated Power 50 W
Musical Power 100 W
Sensitivity@1W,1m 97.4 dB
$ 145.00
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