18″ / 460 mm
Nominal diameter
33 Hz
Resonance
0.4
Q factor
95 dB
Sensitivity
± 10 mm
Linear excursion
1800 W
Program Power
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
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
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
Similar subwoofers to Beyma 18G550
21″Subwoofer
fS
30 Hz
SD
1680 cm²
30 - 1000 Hz
QTS
0.37
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
13
Pmax
3400 W
21″Subwoofer
fS
33 Hz
SD
1680 cm²
33 - 1000 Hz
QTS
0.36
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
13
Pmax
3400 W
18″Subwoofer
fS
32 Hz
SD
1200 cm²
30 - 1000 Hz
QTS
0.40
xmax
10.6 mm
SPL1W
94 dB
Bl/√RE
9.59
Pmax
2400 W