Thiele/Small Parameters

48CWRT122

Re
3.875
Ohm
electrical voice coil resistance at DC
Krm
0.00725
Ohm
WRIGHT inductance model
Erm
0.84
WRIGHT inductance model
Kxm
0.03385
Ohm
WRIGHT inductance model
Exm
0.74
WRIGHT inductance model
Cmes
843.285
µF
electrical capacitance representing moving mass
Lces
36.925
mH
electrical inductance representing driver compliance
Res
85.03
Ohm
resistance due to mechanical losses
fs
28.6
Hz
driver resonance frequency
Mms
190.904
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
178.015
g
mechanical mass of voice coil and diaphragm without air load
Rms
2.6675
kg/s
mechanical resistance of total-driver losses
Cms
0.163
mm/N
mechanical compliance of driver suspension
Kms
6.15
N/mm
mechanical stiffness of driver suspension
Bl
15.049
Tm
force factor (Bl product)
Qtp
0.639
total Q-factor considering all losses
Qms
12.8475
mechanical Q-factor of driver in free air considering Rms only
Qes
0.586
electrical Q-factor of driver in free air considering Re only
Qts
0.5605
total Q-factor considering Re and Rms only
Vas
59.19165
I
equivalent air volume of suspension
n0
0.2265
%
reference efficiency (2 pi-radiation using Re)
Lm
85.745
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.885
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd
506.71
cm²
diaphragm area
Xmax
10.5
mm
Xmax (Linear Excursion)