Smooth BS 12N/250A

General Characteristics for 8Ω

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 for 8Ω

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 for 8Ω

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 for 8Ω

Nominal Impedance
8 Ω
Rated Power
250 W
Musical Power
500 W
Sensitivity@1W,1m
96.4 dB
BS12N250A
12",
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.

Lows
Fat
Mids
Subdued
Highs
Subtle
Bassist Description
Rich, fat and open.
Specification Sheet
Product Dimensions