Thiele/Small Parameters

48CWR122

Re
3.80
Ohm
electrical voice coil resistance at DC
Krm
0.0038
Ohm
WRIGHT inductance mode
Erm
0.95
WRIGHT inductance mode
Kxm
0.0354
Ohm
WRIGHT inductance mode
Exm
0.76
WRIGHT inductance mode
Cmes
760.65
µF
electrical capacitance representing moving mass
Lces
33.66
mH
electrical inductance representing driver compliance
Res
69.29
Ohm
resistance due to mechanical losses
fs
31.5
Hz
driver resonance frequency
Mms
185.445
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)
171.621
g
mechanical mass of voice coil and diaphragm without air load
Rms
3.519
kg/s
mechanical resistance of total-driver losses
Cms
0.138
mm/N
mechanical compliance of driver suspension
Kms
7.24
N/mm
mechanical stiffness of driver suspension
Bl
15.614
Tm
force factor (Bl product)
Lambda
-0.020
suspension creep factor
Qtp
0.617
total Q-factor considering all losses
Qms
10.416
mechanical Q-factor of driver in free air considering Rms only
Qes
0.571
electrical Q-factor of driver in free air considering Re only
Qts
0.541
total Q-factor considering Re and Rms only
Vas
55.0775
I
equivalent air volume of suspension
n0
0.288
%
reference efficiency (2 pi-radiation using Re)
Lm
86.80
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
87.02
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.51
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.67
%
root-mean-square fitting error of transfer function Hx (f)
Sd
530.93
cm²
diaphragm area
Xmax
14
mm
Xmax (Linear Excursion)