Thiele/Small Parameters

42CWQ122

Re
3.765
Ohm
electrical voice coil resistance at DC
Krm
0.01045
Ohm
WRIGHT inductance mode
Erm
0.88
WRIGHT inductance mode
Kxm
0.06865
Ohm
WRIGHT inductance mode
Exm
0.73
WRIGHT inductance mode
Cmes
732.895
µF
electrical capacitance representing moving mass
Lces
26.34
mH
electrical inductance representing driver compliance
Res
56.655
Ohm
resistance due to mechanical losses
fs
36.2
Hz
driver resonance frequency
Mms
264.538
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
251.649
g
mechanical mass of voice coil and diaphragm without air load
Rms
6.37
kg/s
mechanical resistance of total-driver losses
Cms
0.073
mm/N
mechanical compliance of driver suspension
Kms
13.71
N/mm
mechanical stiffness of driver suspension
Bl
18.997
Tm
force factor (Bl product)
Lambda
0.004
suspension creep factor
Qtp
0.7685
total Q-factor considering all losses
Qms
9.4545
mechanical Q-factor of driver in free air considering Rms only
Qes
0.628
electrical Q-factor of driver in free air considering Re only
Qts
0.5885
total Q-factor considering Re and Rms only
Vas
26.52385
I
equivalent air volume of suspension
n0
0.1935
reference efficiency (2 pi-radiation using Re)
Lm
85.06
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.33
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
1.995
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.1
root-mean-square fitting error of transfer function Hx (f)
Sd
506.71
cm²
diaphragm area
Xmax
20.1
mm