Specification Sheet - Smooth BS 8N/250A

8" - 250 W Bass Speakers Loudspeaker
General Characteristics
Nominal Overall Diameter 210 mm 8 in
Nominal Voice Coil Diameter 65 mm 3 in
Magnet Weight 220 g 8 oz
Overall Weight 1.8 kg 3.97 lbs
Flux Density 1.04 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 59 Hz
Mechanical Q Factor QMS 6.72
Electrical Q Factor QES 0.39
Total Q Factor QTS 0.37
Mechanical Moving Mass MMS 32 g
Mechanical Compliance CMS 230 µm/N
Force Factor BxL 12.85 Wb/m
Equivalent Acoustic Volume VAS 14.9 lt.
Maximum Linear Displacement XMAX ±5 mm
Excursion Limit XVAR ±8 mm
Reference Efficiency nO 0.74 %
Diaphragm Area SD 213.8 cm2
Voice Coil Inductance @ 1kHz LE 0.8 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 92.6 dB
4 holes 5.5x7.5on Ø 196.0Ø 210.0Ø 183.045.57.52.035.0Ø 84.080.5