Thiele/Small Parameters

42CWQ102

Re
3.615
Ohm
electrical voice coil resistance at DC
Krm
0.00705
Ohm
WRIGHT inductance mode
Erm
0.895
WRIGHT inductance mode
Kxm
0.0462
Ohm
WRIGHT inductance mode
Exm
0.755
WRIGHT inductance mode
Cmes
527.855
µF
electrical capacitance representing moving mass
Lces
31.015
mH
electrical inductance representing driver compliance
Res
70.49
Ohm
resistance due to mechanical losses
fs
39.35
Hz
driver resonance frequency
Mms
195.373
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
188.089
g
mechanical mass of voice coil and diaphragm without air load
Rms
5.256
kg/s
mechanical resistance of total-driver losses
Cms
0.084
mm/N
mechanical compliance of driver suspension
Kms
11.945
N/mm
mechanical stiffness of driver suspension
Bl
19.2415
Tm
force factor (Bl product)
Lambda
-0.0235
suspension creep factor
Qtp
0.5625
total Q-factor considering all losses
Qms
9.203
mechanical Q-factor of driver in free air considering Rms only
Qes
0.472
electrical Q-factor of driver in free air considering Re only
Qts
0.4485
total Q-factor considering Re and Rms only
Vas
14.2185
I
equivalent air volume of suspension
n0
0.1765
reference efficiency (2 pi-radiation using Re)
Lm
84.67
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.115
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
3.355
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.295
root-mean-square fitting error of transfer function Hx (f)
Sd
346.36
cm²
diaphragm area
Xmax
16.25
mm