Linear parameters

Name

Value

Unit

Comment

Electrical Parameters

Re

3.28

Ohm

electrical voice coil resistance at DC

Le

0.282

mH

frequency independent part of voice coil inductance

L2

0.439

mH

para-inductance of voice coil

R2

4.05

Ohm

electrical resistance due to eddy current losses

Cmes

571.50

µF

electrical capacitance representing moving mass

Lces

14.69

mH

electrical inductance representing driver compliance

Res

40.57

Ohm

resistance due to mechanical losses

fs

54.9

Hz

driver resonance frequency

Mechanical Parameters

(using laser)

Mms

16.576

g

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

Mmd (Sd)

15.649

g

mechanical mass of voice coil and diaphragm without air load

Rms

0.715

kg/s

mechanical resistance of total-driver losses

Cms

0.506

mm/N

mechanical compliance of driver suspension

Kms

1.97

N/mm

mechanical stiffness of driver suspension

Bl

5.39

N/A

force factor (Bl product)

Lambda s

0.066

suspension creep factor

Loss factors

Qtp

0.600

total Q-factor considering all losses

Qms

8.002

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

Qes

0.648

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

Qts

0.599

total Q-factor considering Re and Rms only

Vas

13.8328

l

equivalent air volume of suspension

n0

0.340

%

reference efficiency (2 pi-radiation using Re)

Lm

87.52

dB

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

Lnom

Zn missing

dB

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

rmse Z

2.91

%

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

rmse Hx

2.40

%

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

Series resistor

0.00

Ohm

resistance of series resistor

Sd

138.93

cm

diaphragm area