HELIX IK S12

Shallow subwoofer

12″ / 300 mm
Nominal diameter
36 Hz
Resonance
0.48
Q factor
87 dB
Sensitivity
± 8 mm
Linear excursion
600 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
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
86.8
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
36.0
Hz
Mechanical quality factor
QMS
5.41
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.48

Large signal parameters

Maximum linear excursion
xmax
8.0
mm
Air volume displaced at xmax
VD
418
cm³
Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.1
Ω
Inductance (1kHz, in series, estimated)
LE
1.16
mH
VC Diameter
51
mm
Winding height
HVC
24
mm

Magnet

Force factor (in series)
Bl
17.2
N/A
Motor constant
Bl/√RE
9.77
N/√W

Diaphragm

Effective diameter
258
mm
Effective area
SD
523
cm²
Moving mass
MMS
220
g
Moving mass (without air load)
MMD
211.4
g

Suspensions

Stiffness
KMS
10.53
N/mm
Compliance
CMS
95
µm/N
Equivalent volume to the compliance
VAS
40
L
Mechanical resistance
RMS
7.9
N·s/m

Dimensions

Nominal diameter
12
300
mm
Overall diameter
316
mm
Baffle cutout diameter
277
mm
Mounting depth
96
mm
Volume occupied by the driver (estimated)
2.7
L

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