Electrical
Parameters

Re

3.43

Ohm

electrical voice
coil resistance at DC

Le

0.899

mH

frequency
independent part of voice coil inductance

L2

1.32

mH

para-inductance of
voice coil

R2

13.71

Ohm

electrical
resistance due to eddy current losses

Cmes

610.26

μF

electrical
capacitance representing moving mass

Lces

20.57

mH

electrical
inductance representing driver compliance

Res

34.13

Ohm

resistance due to
mechanical losses

fs

44.9

Hz

driver resonance
frequency

Mechanical
Parameters

(using laser)

Mms

54.697

g

mechanical mass of
driver diaphragm assembly including air load and voice coil

Mmd (Sd)

51.475

g

mechanical mass of
voice coil and diaphragm without air load 

Rms

2.626

kg s

mechanical
resistance of  total-driver losses

Cms

0.229

mm N

mechanical
compliance of driver suspension

Kms

4.36

N mm

mechanical stiffness
of driver suspension

Bl

9.467

N A

force factor (Bl
product)

Lambda s

0.046

suspension creep
factor

Loss factors

Qtp

0.538

total Q-factor
considering all losses

Qms

5.879

mechanical Q-factor
of driver in free air considering Rms only

Qes

0.591

electrical Q-factor
of driver in free air considering Re only

Qts

0.537

total Q-factor
considering Re and Rms only

Other Parameters

Vas

13.1298

l

equivalent air
volume of suspension

n0

0.194

%

reference efficiency
(2 pi-radiation using Re)

Lm

85.07

dB

characteristic sound
pressure level (SPL at 1m for 1W @ Re)

Lnom

85.74

dB

nominal sensitivity
(SPL at 1m for 1W @ Zn)

rmse Z

4.04

%

root-mean-square
fitting error of driver impedance Z(f)

rmse Hx

2.29

%

root-mean-square
fitting error of transfer function Hx (f)

Sd

201.06

cm2

diaphragm area