Thiele/Small Parameters

42CWQ152

Re
3.625
Ohm
electrical voice coil resistance at DC
Krm
0.01455
Ohm
WRIGHT inductance mode
Erm
0.845
WRIGHT inductance mode
Kxm
0.06805
Ohm
WRIGHT inductance mode
Exm
0.735
WRIGHT inductance mode
Cmes
761.75
µF
electrical capacitance representing moving mass
Lces
37.85
mH
electrical inductance representing driver compliance
Res
66.365
Ohm
resistance due to mechanical losses
fs
29.7
Hz
driver resonance frequency
Mms
392.825
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
366.566
g
mechanical mass of voice coil and diaphragm without air load
Rms
7.7775
kg/s
mechanical resistance of total-driver losses
Cms
0.0735
mm/N
mechanical compliance of driver suspension
Kms
13.675
N/mm
mechanical stiffness of driver suspension
Bl
22.709
Tm
force factor (Bl product)
Lambda
0.023
suspension creep factor
Qtp
0.6385
total Q-factor considering all losses
Qms
9.4175
mechanical Q-factor of driver in free air considering Rms only
Qes
0.5155
electrical Q-factor of driver in free air considering Re only
Qts
0.4885
total Q-factor considering Re and Rms only
Vas
68.88015
I
equivalent air volume of suspension
n0
0.3365
reference efficiency (2 pi-radiation using Re)
Lm
87.46
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
87.885
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.91
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.035
root-mean-square fitting error of transfer function Hx (f)
Sd
814.33
cm²
diaphragm area
Xmax
20.5
mm