Specification Sheet - C12Q

12" - 35 W Vintage Ceramic Loudspeaker
C12Q -
8Ω /
16Ω
General Characteristics
Nominal Overall Diameter 306 mm 12 in
Nominal Voice Coil Diameter 32 mm 1.26 in
Magnet Weight 426 g 15 oz
Overall Weight 1.8 kg 3.97 lbs
Flux Density 0.92 T
Voice Coil Winding Depth 9 mm 0.35 in
Magnetic Gap Depth 6 mm 0.24 in
Thiele-Small Parameters
16Ω
Voice Coil DC Resistance RE 6 12 Ω
Resonance Frequency ƒS 87.5 86 Hz
Mechanical Q Factor QMS 12.95 10.16
Total Q Factor QTS 2.23 1.99
Mechanical Moving Mass MMS 29.7 24.3 g
Mechanical Compliance CMS 111 137 µm/N
Force Factor BxL 6.03 8.16 Wb/m
Equivalent Acoustic Volume VAS 38 46.3 lt.
Maximum Linear Displacement XMAX ±1.5 ±1.5 mm
Reference Efficiency nO 1.45 1.2 %
Diaphragm Area SD 490.9 490.8 cm2
Losses Electrical Resistance RES 43.2 50 Ω
Voice Coil Inductance @ 1kHz LE 0.63 0.95 mH
Electrical Q Factor QES 2.69 2.47
Constructive Characteristics
Magnet Ferrite
Voice Coil Winding Copper
Voice Coil Former Epotex
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Solid Paper
Basket Material Pressed Sheet Steel
Surround Treatment No
Electrical Characteristics
16Ω
Nominal Impedance 8 16 Ω
Rated Power 35 35 W
Musical Power 70 70 W
Sensitivity@1W,1m 93.2 93.9 dB
305.5277.04.02.5n° 8 holes 9×6.5at 45° on Ø293.526.0Ø102.0108.56.082.5