Beyma 18G550

Subwoofer

18″ / 460 mm
Nominal diameter
33 Hz
Resonance
0.4
Q factor
95 dB
Sensitivity
± 10 mm
Linear excursion
1800 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
94.7
dB
Frequency response
35 - 1500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
7.00
Electrical quality factor
QES
0.42
Total quality factor
QTS
0.40

Large signal parameters

Maximum linear excursion
xmax
10.0
mm
Maximum excursion before damage
xlim
20.0
mm
Air volume displaced at xmax
VD
1320
cm³
Power handling
P
900
W
Program power
Pmax
1800
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
5.6
Ω
Inductance (1kHz)
LE
1.8
mH
VC Diameter
114
mm
Winding height
HVC
25
mm

Magnet

Force factor
Bl
23.4
N/A
Motor constant
Bl/√RE
9.89
N/√W
Air gap height
HAG
12
mm
Material
Ferrite

Diaphragm

Effective diameter
410
mm
Effective area
SD
1320
cm²
Moving mass
MMS
204
g
Moving mass (without air load)
MMD
172.1
g

Suspensions

Stiffness
KMS
8.55
N/mm
Compliance
CMS
117
µm/N
Equivalent volume to the compliance
VAS
290
L
Mechanical resistance
RMS
6.0
N·s/m

Dimensions

Nominal diameter
18
460
mm
Volume occupied by the driver (estimated)
5.8
L
Net weight
12.6
kg
Beyma 18G550 Impedance
Beyma 18G550 SPL & Distortion
Beyma 18G550 Dimensions

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