Thiele/Small Parameters

42CWQ104

Re
6.585
Ohm
electrical voice coil resistance at DC
Krm
0.01195
Ohm
WRIGHT inductance mode
Erm
0.885
WRIGHT inductance mode
Kxm
0.07585
Ohm
WRIGHT inductance mode
Exm
0.745
WRIGHT inductance mode
Cmes
315.56
µF
electrical capacitance representing moving mass
Lces
47.78
mH
electrical inductance representing driver compliance
Res
106.53
Ohm
resistance due to mechanical losses
fs
41
Hz
driver resonance frequency
Mms
177.437
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
170.153
g
mechanical mass of voice coil and diaphragm without air load
Rms
5.278
kg/s
mechanical resistance of total-driver losses
Cms
0.085
mm/N
mechanical compliance of driver suspension
Kms
11.785
N/mm
mechanical stiffness of driver suspension
Bl
23.713
Tm
force factor (Bl product)
Lambda
-0.006
suspension creep factor
Qtp
0.6195
total Q-factor considering all losses
Qms
8.6625
mechanical Q-factor of driver in free air considering Rms only
Qes
0.5355
electrical Q-factor of driver in free air considering Re only
Qts
0.5045
total Q-factor considering Re and Rms only
Vas
14.4242
I
equivalent air volume of suspension
n0
0.1785
reference efficiency (2 pi-radiation using Re)
Lm
84.715
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.56
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
4.04
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.01
root-mean-square fitting error of transfer function Hx (f)
Sd
346.36
cm²
diaphragm area
Xmax
16.25
mm