Thiele/Small Parameters

45L7R122

Re
3.65
Ohm
electrical voice coil resistance at DC
Krm
0.00825
Ohm
WRIGHT inductance mode
Erm
0.895
WRIGHT inductance mode
Kxm
0.05755
Ohm
WRIGHT inductance mode
Exm
0.73
WRIGHT inductance mode
Cmes
878.4
µF
electrical capacitance representing moving mass
Lces
35.32
mH
electrical inductance representing driver compliance
Res
48.355
Ohm
resistance due to mechanical losses
fs
28.6
Hz
driver resonance frequency
Mms
272.0275
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd
253.51
g
mechanical mass of voice coil and diaphragm without air load
Rms
6.4065
kg/s
mechanical resistance of total-driver losses
Cms
0.114
mm/N
mechanical compliance of driver suspension
Kms
8.815
N/mm
mechanical stiffness of driver suspension
Bl
17.598
Tm
force factor (Bl product)
Lambda
0.0535
suspension creep factor
Qtp
0.651
total Q-factor considering all losses
Qms
7.6345
mechanical Q-factor of driver in free air considering Rms only
Qes
0.577
electrical Q-factor of driver in free air considering Re only
Qts
0.5365
total Q-factor considering Re and Rms only
Vas
67.19975
I
equivalent air volume of suspension
n0
0.262
reference efficiency (2 pi-radiation using Re)
Lm
86.38
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
86.775
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z
2.29
root-mean-square fitting error of driver impedance Z(f)
rmse Hx
1.45
root-mean-square fitting error of transfer function Hx (f)
Sd
645.17
cm²
diaphragm area
Xmax
13.9
mm