Thiele/Small Parameters

48CWRT84

Re
7.665
Ohm
electrical voice coil resistance at DC
Krm
0.0092
Ohm
WRIGHT inductance model
Erm
0.815
WRIGHT inductance model
Kxm
0.03015
Ohm
WRIGHT inductance model
Exm
0.765
WRIGHT inductance model
Cmes
411.38
µF
electrical capacitance representing moving mass
Lces
35.23
mH
electrical inductance representing driver compliance
Res
84.235
Ohm
resistance due to mechanical losses
fs
41.8
Hz
driver resonance frequency
Mms
81.7175
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
78.4355
g
mechanical mass of voice coil and diaphragm without air load
Rms
2.3595
kg/s
mechanical resistance of total-driver losses
Cms
0.177
mm/N
mechanical compliance of driver suspension
Kms
5.645
N/mm
mechanical stiffness of driver suspension
Bl
14.094
Tm
force factor (Bl product)
Qtp
0.8365
total Q-factor considering all losses
Qms
9.1005
mechanical Q-factor of driver in free air considering Rms only
Qes
0.8285
electrical Q-factor of driver in free air considering Re only
Qts
0.7595
total Q-factor considering Re and Rms only
Vas
10.4032
I
equivalent air volume of suspension
n0
0.0885
%
reference efficiency (2 pi-radiation using Re)
Lm
81.655
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
81.845
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd
203.58
cm²
diaphragm area
Xmax
8
mm
Xmax (Linear Excursion)