Dyn Audio Esotar² 430 Midrange

Up for test is the Dyn Audio Esotar² 430 Midrange.  Manufacturer specifications and datasheet can be found here (click link).

dyn 430


Thiele-Small and Impedance

Electrical Parameters
Re 4.33 Ohm electrical voice coil resistance at DC
Le 0.137 mH frequency independent part of voice coil inductance
L2 0.234 mH para-inductance of voice coil
R2 2.66 Ohm electrical resistance due to eddy current losses
Cmes 130 µF electrical capacitance representing moving mass
Lces 21.4 mH electrical inductance representing driver compliance
Res 26.04 Ohm resistance due to mechanical losses
fs 95.6 Hz driver resonance frequency
Mechanical Parameters
(using test encl.)
Mms 3.659 g mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd) 3.462 g mechanical mass of voice coil and diaphragm without air load
Rms 1.085 kg/s mechanical resistance of  total-driver losses
Cms 0.757 mm/N mechanical compliance of driver suspension
Kms 1.32 N/mm mechanical stiffness of driver suspension
Bl 5.315 N/A force factor (Bl product)
Loss factors
Qtp 0.289 total Q-factor considering all losses
Qms 2.026 mechanical Q-factor of driver in free air considering Rms only
Qes 0.337 electrical Q-factor of driver in free air considering Re only
Qts 0.289 total Q-factor considering Re and Rms only
Other Parameters
Vas 2.6241 l equivalent air volume of suspension
n0 0.654 % reference efficiency (2 pi-radiation using Re)
Lm 90.36 dB characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom 90.01 dB nominal sensitivity (SPL at 1m for 1W @ Zn)
Sd 49.48 cm² diaphragm area



Klippel Large Signal Analysis (LSI) Results

Displacement Limits thresholds can be changed in Processing property page
X Bl @ Bl min=82% 3.5 mm Displacement limit due to force factor variation
X C @ C min=75% 3.9 mm Displacement limit due to compliance variation
X L @ Z max=10 % >5.2 mm Displacement limit due to inductance variation
X d @ d2=10% 13.9 mm Displacement limit due to IM distortion (Doppler)
Asymmetry (IEC 62458)
Ak 44.37 % Stiffness asymmetry Ak(Xpeak)
Xsym 0.11 mm Symmetry point of Bl(x) at maximal excursion


Force factor Bl (X) Bl Symmetry RangeStiffness of suspension Kms (X) Kms Symmetry Range Mechanical compliance Cms (X) Electrical inductance L(X, I=0) Inductance over current L(X=0, I)Distortion analysis  Db (Bl-product), Dc (suspension), Dl (inductance) Increase of voice coil temperature Delta Tv (t) and electrical input power P (t)


Frequency Response

The following result is a combination of nearfield and farfield measurements merged at 600hz.  The result is the on-axis measurement at 2.83v/1m.

Dyn Audio Esotar2 430

Unfortunately, I at some point I accidentally wrote over the set of data that included the on and off-axis measurements together, so I had to pull them from a previously posted measurement:

0 30 60

Harmonic Distortion

The following measurement was performed at 1/2 meter.  Not typical of my newer methods of pure nearfield but nevertheless at an output capable of overcoming any ‘floor noise’.  The relative output is 96dB/1m.  I have included higher, odd order distortion at the request of some viewers.

Fundamental + Harmonic distortion components (Relative to 96dB1m)dyn 430 Harmonic distortion (Relative to 96dB1m)

Intermodulated Distortion

These tests were done at 1/2m at a level equal to 96dB/1m.  Please read the titles as they tell you what the graph is illustrating.

Voice Sweep method:

swept voice IMD2 swept voice IMD3

Bass Sweep Method:

bass sweep IMD2 bass sweep Dyn Audio Esotar2 430 Relative third-order intermodulation distortion  ( d3 )

Compression while Voice Sweep Testing:

voice sweep Compression

Leave a Reply

Your email address will not be published. Required fields are marked *