Thiele/Small Parameters

48CWR154

Re
7.34
Ohm
electrical voice coil resistance at DC
Krm
0.0073
Ohm
WRIGHT inductance model
Erm
0.98
WRIGHT inductance model
Kxm
0.0836
Ohm
WRIGHT inductance model
Exm
0.76
WRIGHT inductance model
Cmes
361.44
µF
electrical capacitance representing moving mass
Lces
83.91
mH
electrical inductance representing driver compliance
Res
171.70
Ohm
resistance due to mechanical losses
fs
28.9
Hz
driver resonance frequency
Mms
272.838
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
246.822
g
mechanical mass of voice coil and diaphragm without air load
Rms
4.396
kg/s
mechanical resistance of total-driver losses
Cms
0.111
mm/N
mechanical compliance of driver suspension
Kms
9.00
N/mm
mechanical stiffness of driver suspension
Bl
27.475
Tm
force factor (Bl product)
Lambda
-0.014
suspension creep factor
Qtp
0.534
total Q-factor considering all losses
Qms
11.269
mechanical Q-factor of driver in free air considering Rms only
Qes
0.482
electrical Q-factor of driver in free air considering Re only
Qts
0.462
total Q-factor considering Re and Rms only
Vas
103.034
I
equivalent air volume of suspension
n0
0.496
%
reference efficiency (2 pi-radiation using Re)
Lm
89.16
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
89.53
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.19
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
2.44
%
root-mean-square fitting error of transfer function Hx (f)
Sd
809.28
cm²
diaphragm area
Xmax
14.5
mm
Xmax (Linear Excursion)