Specification Sheet - C15K

15" - 100 W Vintage Ceramic Loudspeaker
C15K -
8Ω /
16Ω
General Characteristics
Nominal Overall Diameter 385 mm 15 in
Nominal Voice Coil Diameter 50 mm 2 in
Magnet Weight 1450 g 51 oz
Overall Weight 5.3 kg 11.68 lbs
Flux Density 1.15 T
Voice Coil Winding Depth 10 mm 0.39 in
Magnetic Gap Depth 8 mm 0.31 in
Thiele-Small Parameters
16Ω
Voice Coil DC Resistance RE 6.85 11.9 Ω
Resonance Frequency ƒS 71 73.8 Hz
Mechanical Q Factor QMS 10.4 9.87
Total Q Factor QTS 0.75 0.95
Mechanical Moving Mass MMS 53.5 56.1 g
Mechanical Compliance CMS 94 82 µm/N
Force Factor BxL 14.19 17.21 Wb/m
Equivalent Acoustic Volume VAS 75.8 66.2 lt.
Maximum Linear Displacement XMAX ±1 ±1 mm
Reference Efficiency nO 3.6 2.47 %
Diaphragm Area SD 754.8 754.8 cm2
Losses Electrical Resistance RES 110 111.8 Ω
Voice Coil Inductance @ 1kHz LE 0.92 1.28 mH
Electrical Q Factor QES 0.81 1.05
Constructive Characteristics
Magnet Ferrite
Voice Coil Winding Copper
Voice Coil Former Kapton
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Non-treated Cloth
Basket Material Pressed Sheet Steel
Surround Treatment Yes
Electrical Characteristics
16Ω
Nominal Impedance 8 16 Ω
Rated Power 100 100 W
Musical Power 200 200 W
Sensitivity@1W,1m 97.9 97.4 dB
383.0358.04.06.5107.0144.0Ø154.037.08.0n° 8 holes 6×9on Ø372.0