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
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
Electrical Q Factor QES 0.45
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