Thiele/Small Parameters

48CWR104

Re
7.155
Ohm
electrical voice coil resistance at DC
Krm
0.00575
Ohm
WRIGHT inductance model
Erm
0.94
WRIGHT inductance model
Kxm
0.0535
Ohm
WRIGHT inductance model
Exm
0.755
WRIGHT inductance model
Cmes
378.565
µF
electrical capacitance representing moving mass
Lces
55.405
mH
electrical inductance representing driver compliance
Res
133.045
Ohm
resistance due to mechanical losses
fs
34.9
Hz
driver resonance frequency
Mms
128.236
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
120.952
g
mechanical mass of voice coil and diaphragm without air load
Rms
2.5785
kg/s
mechanical resistance of total-driver losses
Cms
0.163
mm/N
mechanical compliance of driver suspension
Kms
6.17
N/mm
mechanical stiffness of driver suspension
Bl
18.4055
Tm
force factor (Bl product)
Lambda
0.009
suspension creep factor
Qtp
0.6295
total Q-factor considering all losses
Qms
10.966
mechanical Q-factor of driver in free air considering Rms only
Qes
0.594
electrical Q-factor of driver in free air considering Re only
Qts
0.563
total Q-factor considering Re and Rms only
Vas
27.6937
I
equivalent air volume of suspension
n0
0.1895
%
reference efficiency (2 pi-radiation using Re)
Lm
84.98
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.465
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.98
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.675
%
root-mean-square fitting error of transfer function Hx (f)
Sd
346.36
cm²
diaphragm area
Xmax
14
mm
Xmax (Linear Excursion)