Thiele/Small Parameters

44L7S84

Re
6.638
Ohm
electrical voice coil resistance at DC
Le
4.7588
mH
frequency independent part of voice coil inductance
Krm
0.01188
Ohm
WRIGHT inductance mode
Erm
0.844
WRIGHT inductance mode
Kxm
0.05306
Ohm
WRIGHT inductance mode
Exm
0.748
WRIGHT inductance mode
Cmes
440.15
µF
electrical capacitance representing moving mass
Lces
29.078
mH
electrical inductance representing driver compliance
Res
73.962
Ohm
resistance due to mechanical losses
fs
44.64
Hz
driver resonance frequency
Mms
122.979
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
117.9948
g
mechanical mass of voice coil and diaphragm without air load
Rms
3.7912
kg/s
mechanical resistance of total-driver losses
Cms
0.1034
mm/N
mechanical compliance of driver suspension
Kms
9.68
N/mm
mechanical stiffness of driver suspension
Bl
16.7426
N/A
force factor (Bl product)
Lambda
0.0414
suspension creep factor
Qtp
0.8884
total Q-factor considering all losses
Qms
9.1052
mechanical Q-factor of driver in free air considering Rms only
Qes
0.819
electrical Q-factor of driver in free air considering Re only
Qts
0.7516
total Q-factor considering Re and Rms only
Vas
10.59684
I
equivalent air volume of suspension
n0
0.111
%
reference efficiency (2 pi-radiation using Re)
Lm
82.642
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
83.454
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
3.686
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.014
root-mean-square fitting error of transfer function Hx (f)
Sd
268.96
cm²
diaphragm area
Xmax
13.5
mm