Thiele/Small Parameters

42CWQ154

Re
5.995
Ohm
electrical voice coil resistance at DC
Krm
0.0236
Ohm
WRIGHT inductance mode
Erm
0.83
WRIGHT inductance mode
Kxm
0.10725
Ohm
WRIGHT inductance mode
Exm
0.72
WRIGHT inductance mode
Cmes
487.425
µF
electrical capacitance representing moving mass
Lces
56.28
mH
electrical inductance representing driver compliance
Res
107.84
Ohm
resistance due to mechanical losses
fs
30.45
Hz
driver resonance frequency
Mms
373.217
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
346.9575
g
mechanical mass of voice coil and diaphragm without air load
Rms
7.189
kg/s
mechanical resistance of total-driver losses
Cms
0.0735
mm/N
mechanical compliance of driver suspension
Kms
13.69
N/mm
mechanical stiffness of driver suspension
Bl
27.6775
Tm
force factor (Bl product)
Lambda
0.02
suspension creep factor
Qtp
0.68
total Q-factor considering all losses
Qms
9.9955
mechanical Q-factor of driver in free air considering Rms only
Qes
0.56
electrical Q-factor of driver in free air considering Re only
Qts
0.53
total Q-factor considering Re and Rms only
Vas
68.89415
I
equivalent air volume of suspension
n0
0.335
reference efficiency (2 pi-radiation using Re)
Lm
87.44
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
88.69
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.875
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.42
root-mean-square fitting error of transfer function Hx (f)
Sd
814.33
cm²
diaphragm area
Xmax
20.5
mm