Thiele/Small Parameters

48CWR84

Re
7.68
Ohm
electrical voice coil resistance at DC
Krm
0.006
Ohm
WRIGHT inductance mode
Erm
0.88
WRIGHT inductance mode
Kxm
0.0337
Ohm
WRIGHT inductance mode
Exm
0.77
WRIGHT inductance mode
Cmes
390.12
µF
electrical capacitance representing moving mass
Lces
32.89
mH
electrical inductance representing driver compliance
Res
128.91
Ohm
resistance due to mechanical losses
fs
44.4
Hz
driver resonance frequency
Mms
69.9
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)
66.971
g
mechanical mass of voice coil and diaphragm without air load
Rms
1.39
kg/s
mechanical resistance of total-driver losses
Cms
0.184
mm/N
mechanical compliance of driver suspension
Kms
5.45
N/mm
mechanical stiffness of driver suspension
Bl
13.386
Tm
force factor (Bl product)
Lambda
0.04
suspension creep factor
Qtp
0.873
total Q-factor considering all losses
Qms
14.039
mechanical Q-factor of driver in free air considering Rms only
Qes
0.836
electrical Q-factor of driver in free air considering Re only
Qts
0.789
total Q-factor considering Re and Rms only
Vas
9.249
I
equivalent air volume of suspension
n0
0.093
%
reference efficiency (2 pi-radiation using Re)
Lm
81.9
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
82.07
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
3.55
%
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.97
%
root-mean-square fitting error of transfer function Hx (f)
Sd
188.69
cm²
diaphragm area
Xmax
10.5
mm
Xmax (Linear Excursion)