Thiele/Small Parameters

48CWRT674

Re
7.895
Ohm
electrical voice coil resistance at DC
Krm
0.004
Ohm
WRIGHT inductance model
Erm
0.86
WRIGHT inductance model
Kxm
0.02175
Ohm
WRIGHT inductance model
Exm
0.765
WRIGHT inductance model
Cmes
315.665
µF
electrical capacitance representing moving mass
Lces
16.925
mH
electrical inductance representing driver compliance
Res
84.49
Ohm
resistance due to mechanical losses
fs
68.9
Hz
driver resonance frequency
Mms
40.9335
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
39.3225
g
mechanical mass of voice coil and diaphragm without air load
Rms
1.5355
kg/s
mechanical resistance of total-driver losses
Cms
0.1305
mm/N
mechanical compliance of driver suspension
Kms
7.67
N/mm
mechanical stiffness of driver suspension
Bl
11.3865
Tm
force factor (Bl product)
Qtp
1.0705
total Q-factor considering all losses
Qms
11.5395
mechanical Q-factor of driver in free air considering Rms only
Qes
1.0785
electrical Q-factor of driver in free air considering Re only
Qts
0.9865
total Q-factor considering Re and Rms only
Vas
2.96545
I
equivalent air volume of suspension
n0
0.0865
%
reference efficiency (2 pi-radiation using Re)
Lm
81.56
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
81.615
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd
126.68
cm²
diaphragm area
Xmax
5.1
mm
Xmax (Linear Excursion)