Airborne FR124B8-19F

The following test is for the Airborne FR124B8-19F which can be purchased from Solen here.  At the time of this test, the MSRP is approximately $51CAD ($50USD).

IMG_6406 IMG_6405



Thiele-Small Parameters

Electrical Parameters
Re 7.24 Ohm electrical voice coil resistance at DC
Le 0.203 mH frequency independent part of voice coil inductance
L2 0.25 mH para-inductance of voice coil
R2 2.11 Ohm electrical resistance due to eddy current losses
Cmes 208 µF electrical capacitance representing moving mass
Lces 18.19 mH electrical inductance representing driver compliance
Res 65.52 Ohm resistance due to mechanical losses
fs 81.8 Hz driver resonance frequency
fm 53.6 Hz resonance frequency of driver with additional mass
Mechanical Parameters
(using add. mass)
Mms 5.573 g mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd) 5.411 g mechanical mass of voice coil and diaphragm without air load
Rms 0.409 kg/s mechanical resistance of  total-driver losses
Cms 0.679 mm/N mechanical compliance of driver suspension
Kms 1.47 N/mm mechanical stiffness of driver suspension
Bl 5.176 N/A force factor (Bl product)
Loss factors
Qtp 0.697 total Q-factor considering all losses
Qms 7.006 mechanical Q-factor of driver in free air considering Rms only
Qes 0.774 electrical Q-factor of driver in free air considering Re only
Qts 0.697 total Q-factor considering Re and Rms only
Other Parameters
Vas 0.7183 l equivalent air volume of suspension
n0 0.049 % reference efficiency (2 pi-radiation using Re)
Lm 79.09 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 6.39 % root-mean-square fitting error of driver impedance Z(f)
Series resistor 0 Ohm resistance of series resistor
Madd 7.73 g additional mass
Sd 27.34 cm² diaphragm area

Aiborne FR124BB-19F Magnitude of electric impedance Z(f)

Large Signal Parameters

Displacement Limits thresholds can be changed in Processing property page
X Bl @ Bl min=82% 2.4 mm Displacement limit due to force factor variation
X C @ C min=75% 2.8 mm Displacement limit due to compliance variation
X L @ Z max=10 % 3.5 mm Displacement limit due to inductance variation
X d @ d2=10% 14 mm Displacement limit due to IM distortion (Doppler)
Asymmetry (IEC 62458)
Ak -9.27 % Stiffness asymmetry Ak(Xpeak)
Xsym -0.11 mm Symmetry point of Bl(x) at maximal excursion

Airborne FR124B8-19F Force factor Bl (X) Airborne FR124B8-19F Bl Symmetry Range Airborne FR124B8-19F Mechanical compliance Cms (X) Airborne FR124B8-19F Stiffness of suspension Kms (X) Airborne FR124B8-19F Kms Symmetry Range Airborne FR124B8-19F Electrical inductance L(X, I=0) Airborne FR124B8-19F Inductance over current L(X=0, I)

Frequency Response

The following measurement result is a result of merging nearfield response with farfield at 2.83v/1m to illustrate a standard 2.83v/1m measurement.

Airborne FR124B8-19F  0 30 60


Harmonic Distortion at 96dB/1m

FR124B8-19F 96dB HD

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