BMS 15N820

Subwoofer

15″ / 388 mm
Nominal diameter
39 Hz
Resonance
0.26
Q factor
97 dB
Sensitivity
± 4.5 mm
Linear excursion
1800 W
Program Power
BMS 15N820 Subwoofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
97.1
dB
Frequency response
40 - 2500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
39.2
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.27
Total quality factor
QTS
0.26

Large signal parameters

Maximum linear excursion
xmax
4.5
mm
Air volume displaced at xmax
VD
396
cm³
Power handling
P
900
W
Program power
Pmax
1800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.7
Ω
Inductance (1kHz)
LE
0.81
mH
VC Diameter
102
mm
Winding height
HVC
19
mm
Winding material
Copper

Magnet

Force factor
Bl
24.2
N/A
Motor constant
Bl/√RE
10.1
N/√W
Air gap height
HAG
10
mm
Material
Neodymium

Diaphragm

Effective diameter
335
mm
Effective area
SD
880
cm²
Moving mass
MMS
114
g
Moving mass (without air load)
MMD
96
g

Suspensions

Stiffness
KMS
6.94
N/mm
Compliance
CMS
144
µm/N
Equivalent volume to the compliance
VAS
159
L
Mechanical resistance
RMS
6.24
N·s/m

Dimensions

Nominal diameter
15
″
388
mm
Overall diameter
388
mm
Baffle cutout diameter
358
mm
Overall depth
184
mm
Volume occupied by the driver (estimated)
3.5
L
Net weight
5.7
kg
Frame material
Cast Aluminum
Impedance
SPL & Distortion
BMS 15N820 Impedance
BMS 15N820 SPL & Distortion
BMS 15N820 Dimensions
DatasheetDatasheet

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