Thiele/Small Parameters

44CWCS154

Re
3.345
Ohm
electrical voice coil resistance at DC
Krm
0.00155
Ohm
WRIGHT inductance mode
Erm
1.065
WRIGHT inductance mode
Kxm
0.02925
Ohm
WRIGHT inductance mode
Exm
0.785
WRIGHT inductance mode
Cmes
1016.24
µF
electrical capacitance representing moving mass
Lces
38.19
mH
electrical inductance representing driver compliance
Res
116.05
Ohm
resistance due to mechanical losses
fs
25.55
Hz
driver resonance frequency
Mms
240.0515
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
213.0515
g
mechanical mass of voice coil and diaphragm without air load
Rms
2.039
kg/s
mechanical resistance of total-driver losses
Cms
0.162
mm/N
mechanical compliance of driver suspension
Kms
6.2
N/mm
mechanical stiffness of driver suspension
Bl
15.363
Tm
force factor (Bl product)
Lambda
-0.009
suspension creep factor
Qtp
0.582
total Q-factor considering all losses
Qms
18.919
mechanical Q-factor of driver in free air considering Rms only
Qes
0.5455
electrical Q-factor of driver in free air considering Re only
Qts
0.5305
total Q-factor considering Re and Rms only
Vas
157.77005
I
equivalent air volume of suspension
n0
0.466
reference efficiency (2 pi-radiation using Re)
Lm
88.865
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
89.645
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
4.015
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.2
root-mean-square fitting error of transfer function Hx (f)
Sd
829.58
cm²
diaphragm area
Xmax
13.5
mm