Thiele/Small Parameters

44L7S122

Re
3.86
Ohm
electrical voice coil resistance at DC
Le
4.5005
mH
frequency independent part of voice coil inductance
Krm
0.018625
Ohm
WRIGHT inductance mode
Erm
0.805
WRIGHT inductance mode
Kxm
0.0866
Ohm
WRIGHT inductance mode
Exm
0.68
WRIGHT inductance mode
Cmes
843.6725
µF
electrical capacitance representing moving mass
Lces
31.7125
mH
electrical inductance representing driver compliance
Res
69.165
Ohm
resistance due to mechanical losses
fs
30.85
Hz
driver resonance frequency
Mms
281.75825
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
263.24075
g
mechanical mass of voice coil and diaphragm without air load
Rms
4.84575
kg/s
mechanical resistance of total-driver losses
Cms
0.09475
mm/N
mechanical compliance of driver suspension
Kms
10.5875
N/mm
mechanical stiffness of driver suspension
Bl
18.2875
N/A
force factor (Bl product)
Lambda
0.0485
suspension creep factor
Loss Factors
Qtp
0.7855
total Q-factor considering all losses
Qms
11.26875
mechanical Q-factor of driver in free air considering Rms only
Qes
0.6315
electrical Q-factor of driver in free air considering Re only
Qts
0.59775
total Q-factor considering Re and Rms only
Vas
55.76585
I
equivalent air volume of suspension
n0
0.25
%
reference efficiency (2 pi-radiation using Re)
Lm
86.1675
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
86.32
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.215
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.875
%
root-mean-square fitting error of transfer function Hx (f)
Sd
645.17
cm²
diaphragm area
Xmax
16.25
mm