Thiele/Small Parameters

42CWQ124

Re
6.1
Ohm
electrical voice coil resistance at DC
Krm
0.00945
Ohm
WRIGHT inductance mode
Erm
0.935
WRIGHT inductance mode
Kxm
0.0954
Ohm
WRIGHT inductance mode
Exm
0.73
WRIGHT inductance mode
Cmes
440.86
µF
electrical capacitance representing moving mass
Lces
40.18
mH
electrical inductance representing driver compliance
Res
83.905
Ohm
resistance due to mechanical losses
fs
37.8
Hz
driver resonance frequency
Mms
257.4875
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
244.599
g
mechanical mass of voice coil and diaphragm without air load
Rms
6.964
kg/s
mechanical resistance of total-driver losses
Cms
0.0685
mm/N
mechanical compliance of driver suspension
Kms
14.54
N/mm
mechanical stiffness of driver suspension
Bl
24.1725
Tm
force factor (Bl product)
Lambda
-0.031
suspension creep factor
Qtp
0.7355
total Q-factor considering all losses
Qms
8.7885
mechanical Q-factor of driver in free air considering Rms only
Qes
0.6385
electrical Q-factor of driver in free air considering Re only
Qts
0.5955
total Q-factor considering Re and Rms only
Vas
24.9853
I
equivalent air volume of suspension
n0
0.2035
reference efficiency (2 pi-radiation using Re)
Lm
85.29
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
86.465
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.81
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.725
root-mean-square fitting error of transfer function Hx (f)
Sd
506.71
cm²
diaphragm area
Xmax
20.1
mm