D.A.S. Audio 18H
Low frequency
18″ / 457 mm
Nominal diameter
33 Hz
Resonance
0.28
Q factor
97 dB
Sensitivity
± 6 mm
Linear excursion
1200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.7
dB
Frequency response
30 - 2000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
3.90
Electrical quality factor
QES
0.30
Total quality factor
QTS
0.28
Large signal parameters
Maximum linear excursion
xmax
6.0
mm
Maximum excursion before damage
xlim
12.0
mm
Air volume displaced at xmax
VD
698
cm³
Power handling
P
600
W
Program power
Pmax
1200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
6.1
Ω
Inductance (1kHz, estimated)
LE
1.72
mH
VC Diameter
102
mm
Winding height
HVC
16
mm
Winding material
Copper
Former material
Glass Fibre Reinforced Polymer
Magnet
Force factor
Bl
24.1
N/A
Motor constant
Bl/√RE
9.76
N/√W
Air gap height
HAG
8
mm
Material
Ferrite
Diaphragm
Effective diameter
385
mm
Effective area
SD
1164
cm²
Moving mass
MMS
140
g
Moving mass (without air load)
MMD
112.1
g
Suspensions
Stiffness
KMS
5.95
N/mm
Compliance
CMS
168
µm/N
Equivalent volume to the compliance
VAS
323
L
Mechanical resistance
RMS
7.45
N·s/m
Surround material
Polycotton
Spider material
Polycotton
Dimensions
Nominal diameter
18
″
457
mm
Baffle cutout diameter
417
mm
Volume occupied by the driver (estimated)
6.9
L
Frame material
Injected Aluminum
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SD
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SD
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