Thiele/Small Parameters

51CWQ124

Electrical Parameters
Re
7
Ohm
electrical voice coil resistance at DC
Krm
0.0222
Ohm
WRIGHT inductance model
Erm
0.835
WRIGHT inductance model
Kxm
0.1153
Ohm
WRIGHT inductance model
Exm
0.715
WRIGHT inductance model
Cmes
410.68
µF
electrical capacitance representing moving mass
Lces
48.16
mH
electrical inductance representing driver compliance
Res
117.9
Ohm
resistance due to mechanical losses
fs
35.9
Hz
driver resonance frequency
Mechanical Parameters
Mms
286.744
g
mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)
273.855
g
mechanical mass of voice coil and diaphragm without air load
Rms
5.929
kg/s
mechanical resistance of total-driver losses
Cms
0.069
mm/N
mechanical compliance of driver suspension
Kms
14.625
N/mm
mechanical stiffness of driver suspension
Bl
26.426
Tm
force factor (Bl product)
Loss factors
Qtp
0.7795
total Q-factor considering all losses
Qms
10.904
mechanical Q-factor of driver in free air considering Rms only
Qes
0.6475
electrical Q-factor of driver in free air considering Re only
Qts
0.6115
total Q-factor considering Re and Rms only
Other Parameters
Vas
25.08375
L
equivalent air volume of suspension
n0
0.171
reference efficiency (2 pi-radiation using Re)
Lm
84.53
dB
characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom
85.11
dB
nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd
506.71
cm²
diaphragm area
Xmax
23.0
mm