Thiele/Small Parameters

52L7XS181

Re
2.025
Ohm
electrical voice coil resistance at DC
Krm
0.0266
Ohm
WRIGHT inductance model
Erm
0.755
WRIGHT inductance model
Kxm
0.08235
Ohm
WRIGHT inductance model
Exm
0.665
WRIGHT inductance model
Cmes
1288.66
µF
electrical capacitance representing moving mass
Lces
21.865
mH
electrical inductance representing driver compliance
Res
16.605
Ohm
resistance due to mechanical losses
fs
30.05
Hz
driver resonance frequency
Mms
1184.2695
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)
1117.239
g
mechanical mass of voice coil and diaphragm without air load
Rms
55.347
kg/s
mechanical resistance of total-driver losses
Cms
0.024
mm/N
mechanical compliance of driver suspension
Kms
42.2
N/mm
mechanical stiffness of driver suspension
Bl
30.317
Tm
force factor (Bl product)
Lambda s
0.091
suspension creep factor
Qtp
0.6845
total Q-factor considering all losses
Qms
4.042
mechanical Q-factor of driver in free air considering Rms only
Qes
0.492
electrical Q-factor of driver in free air considering Re only
Qts
0.439
total Q-factor considering Re and Rms only
Vas
77.76615
I
equivalent air volume of suspension
n0
0.411
reference efficiency (2 pi-radiation using Re)
Lm
88.34
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
88.285
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd
1521
cm²
diaphragm area
Xmax
49.1
mm