Smooth BS 12N/250A

General Characteristics for 8Ω
Nominal Overall Diameter320 mm.12 in.
Nominal Voice Coil Diameter65 mm.2.50 in.
Magnet Weight220 g7.76 oz
Overall Weight5.51 lbs
Flux Density1.14 T
Voice Coil Winding Depth0.71 in.
Magnetic Gap Depth0.31 in.
Thiele-Small Parameters for 8Ω
Voice Coil DC ResistanceRE5.50 Ω
Resonance FrequencyƒS47.0 Hz
Mechanical Q FactorQMS12.58
Electrical Q FactorQES0.44
Total Q FactorQTS0.43
Mechanical Moving MassMMS56.7 g
Mechanical ComplianceCMS200 µm/N
Force FactorBxL14.37 Wb/m
Equivalent Acoustic VolumeVAS81.3 lt.
Maximum Linear DisplacementXMAX±5.50 mm
Excursion LimitXVAR±8.9 mm
Reference EfficiencynO1.81 %
Diaphragm AreaSD530.9 cm2
Voice Coil Inductance @ 1kHzLE1.00 mH
Constructive Characteristics for 8Ω
Voice Coil WindingCopper
Voice Coil FormerFiberglass
Cone MaterialPaper
Surround MaterialTreated Cloth
Dust Dome MaterialSolid Paper
Basket MaterialAluminum Die-Cast
Cone TreatmentSurface Waterproof Treatment
Electrical Characteristics for 8Ω
Nominal Impedance8 Ω
Rated Power250 W
Musical Power500 W
Sensitivity@1W,1m96.4 dB
250 watts
  • Ohms:

Smooth Sound speakers are extremely clean and round with superb headroom. Equipped with neodymium magnets and aluminium baskets, they offer great linear excursion and dynamics. They are ideal for modern styles where extended low end is required. Neodymium magnets offer a 50% reduction in weight guaranteeing very light systems. The proprietary aluminium basket was specially designed to avoid sound wave reflections on the rear side of the cone, thereby allowing for faster and better cooling of both the voice coil and the air moved by it.

Rich, fat and open.
Sound Samples:
Blues (Walking Groove)00:20
Reggae (Smooth Groove)00:23
Rock (Pick Attack)00:41
Funk (Slap Attack)00:16
Having trouble playing our sound samples? Click here to access the files directly.