Thiele/Small Parameters

44CWCD84

Re
7.555
Ohm
electrical voice coil resistance at DC
Krm
0.00305
Ohm
WRIGHT inductance mode
Erm
0.94
WRIGHT inductance mode
Kxm
0.02685
Ohm
WRIGHT inductance mode
Exm
0.775
WRIGHT inductance mode
Cmes
375.85
µF
electrical capacitance representing moving mass
Lces
32.745
mH
electrical inductance representing driver compliance
Res
141.89
Ohm
resistance due to mechanical losses
fs
45.4
Hz
driver resonance frequency
Mms
56.358
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
53.136
g
mechanical mass of voice coil and diaphragm without air load
Rms
1.0575
kg/s
mechanical resistance of total-driver losses
Cms
0.2185
mm/N
mechanical compliance of driver suspension
Kms
4.59
N/mm
mechanical stiffness of driver suspension
Bl
12.2465
Tm
force factor (Bl product)
Lambda
0.0035
suspension creep factor
Qtp
0.8275
total Q-factor considering all losses
Qms
15.207
mechanical Q-factor of driver in free air considering Rms only
Qes
0.8095
electrical Q-factor of driver in free air considering Re only
Qts
0.7685
total Q-factor considering Re and Rms only
Vas
12.50925
I
equivalent air volume of suspension
n0
0.1385
reference efficiency (2 pi-radiation using Re)
Lm
83.62
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
83.87
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
3.17
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.865
root-mean-square fitting error of transfer function Hx (f)
Sd
201.06
cm²
diaphragm area
Xmax
11.125
mm