Specification Sheet - Smooth BS 12N/250A

12" - 250 W Bass Speakers Loudspeaker
General Characteristics
Nominal Overall Diameter 320 mm 13 in
Nominal Voice Coil Diameter 65 mm 3 in
Magnet Weight 220 g 8 oz
Overall Weight 2.5 kg 5.51 lbs
Flux Density 1.14 T
Voice Coil Winding Depth 18 mm 0.71 in
Magnetic Gap Depth 10 mm 0.39 in
Thiele-Small Parameters
Voice Coil DC Resistance RE 5.5 Ω
Resonance Frequency ƒS 47 Hz
Mechanical Q Factor QMS 12.58
Electrical Q Factor QES 0.44
Total Q Factor QTS 0.43
Mechanical Moving Mass MMS 56.7 g
Mechanical Compliance CMS 200 µm/N
Force Factor BxL 14.37 Wb/m
Equivalent Acoustic Volume VAS 81.3 lt.
Maximum Linear Displacement XMAX ±5.5 mm
Excursion Limit XVAR ±8.9 mm
Reference Efficiency nO 1.81 %
Diaphragm Area SD 530.9 cm2
Voice Coil Inductance @ 1kHz LE 1 mH
Constructive Characteristics
Magnet Neodymium
Voice Coil Winding Copper
Voice Coil Former Fiberglass
Cone Material Paper
Surround Material Treated Cloth
Dust Dome Material Solid Paper
Basket Material Aluminum Die-Cast
Surround Treatment Yes
Electrical Characteristics
Nominal Impedance 8 Ω
Rated Power 250 W
Musical Power 500 W
Sensitivity@1W,1m 96.4 dB
8 holes Ø6.0mmon Ø 300.0mmØ 320.0Ø 282.0Ø 84.035.06.583.0118.04.0