Beyma SM-115N

Woofer

15″ / 380 mm
Nominal diameter
35 Hz
Resonance
0.38
Q factor
96 dB
Sensitivity
± 7.25 mm
Linear excursion
800 W
Program Power
Discontinued
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
95.5
dB
Frequency response
35 - 3000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
35.0
Hz
Mechanical quality factor
QMS
8.50
Electrical quality factor
QES
0.40
Total quality factor
QTS
0.38

Large signal parameters

Maximum linear excursion
xmax
7.25
mm
Maximum excursion before damage
xlim
15.0
mm
Air volume displaced at xmax
VD
638
cm³
Power handling
P
400
W
Program power
Pmax
800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.4
Ω
Inductance (1kHz)
LE
1.2
mH
VC Diameter
77
mm
Winding height
HVC
17.5
mm

Magnet

Force factor
Bl
17.4
N/A
Motor constant
Bl/√RE
6.88
N/√W
Air gap height
HAG
7
mm
Material
Ferrite

Diaphragm

Effective diameter
335
mm
Effective area
SD
880
cm²
Moving mass
MMS
86
g
Moving mass (without air load)
MMD
68.4
g

Suspensions

Stiffness
KMS
4.12
N/mm
Compliance
CMS
243
µm/N
Equivalent volume to the compliance
VAS
267
L
Mechanical resistance
RMS
2.2
N·s/m

Dimensions

Nominal diameter
15
380
mm
Volume occupied by the driver (estimated)
2.9
L
Net weight
6.5
kg
Beyma SM-115N Impedance
Beyma SM-115N SPL & Distortion
Beyma SM-115N Dimensions

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