Thiele/Small Parameters

44L7S154

Re
6.892
Ohm
electrical voice coil resistance at DC
Le
7.6355
mH
frequency independent part of voice coil inductance
Krm
0.0353
Ohm
WRIGHT inductance mode
Erm
0.79
WRIGHT inductance mode
Kxm
0.14534
Ohm
WRIGHT inductance mode
Exm
0.678
WRIGHT inductance mode
Cmes
530.828
µF
electrical capacitance representing moving mass
Lces
73.732
mH
electrical inductance representing driver compliance
Res
180.842
Ohm
resistance due to mechanical losses
fs
25.48
Hz
driver resonance frequency
Mms
410.5428
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
372.4636
g
mechanical mass of voice coil and diaphragm without air load
Rms
4.2818
kg/s
mechanical resistance of total-driver losses
Cms
0.0954
mm/N
mechanical compliance of driver suspension
Kms
10.53
N/mm
mechanical stiffness of driver suspension
Bl
27.8108
N/A
force factor (Bl product)
Lambda
0.011
suspension creep factor
Qtp
0.718
total Q-factor considering all losses
Qms
15.3538
mechanical Q-factor of driver in free air considering Rms only
Qes
0.5856
electrical Q-factor of driver in free air considering Re only
Qts
0.5642
total Q-factor considering Re and Rms only
Vas
146.95102
I
equivalent air volume of suspension
n0
0.3978
%
reference efficiency (2 pi-radiation using Re)
Lm
88.194
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
88.842
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.69
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.7975
%
root-mean-square fitting error of transfer function Hx (f)
Sd
1043.294
cm²
diaphragm area
Xmax
19
mm