Fountek FR89EX
Full-range
3.5″ / 89 mm
Nominal diameter
97 Hz
Resonance
0.52
Q factor
85 dB
Sensitivity
± 5 mm
Linear excursion
50 W
Program Power
![Fountek FR89EX Full-range](/Fountek/FR89EX/Fountek_FR89EX_(Photo_1).jpg)
![Fountek FR89EX Full-range](/Fountek/FR89EX/Fountek_FR89EX_(Photo_2).jpg)
![Fountek FR89EX Full-range](/Fountek/FR89EX/Fountek_FR89EX_(Photo_3).jpg)
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 85.1
- dB
- Frequency response
- 70 - 20000
- Hz
- Resonance frequency (free air)
- fS
- 97.0
- Hz
- Mechanical quality factor
- QMS
- 4.89
- Electrical quality factor
- QES
- 0.58
- Total quality factor
- QTS
- 0.52
- Maximum linear excursion
- xmax
- 5.0
- mm
- Air volume displaced at xmax
- VD
- 14
- cm³
- Power handling
- P
- 25
- W
- Program power
- Pmax
- 50
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.8
- Ω
- Inductance (1kHz, estimated)
- LE
- 0.13
- mH
- VC Diameter
- 25
- mm
- Winding height
- HVC
- 5
- mm
- Winding material
- Copper
- Former material
- Kapton
- Flux density
- B
- 0.85
- T
- Force factor
- Bl
- 3.69
- N/A
- Motor constant
- Bl/√RE
- 1.53
- N/√W
- Air gap height
- HAG
- 14
- mm
- Material
- Neodymium
- Effective diameter
- 60
- mm
- Effective area
- SD
- 28
- cm²
- Moving mass
- MMS
- 2.2
- g
- Moving mass (without air load)
- MMD
- 2.1
- g
- Stiffness
- KMS
- 0.82
- N/mm
- Compliance
- CMS
- 1217
- µm/N
- Equivalent volume to the compliance
- VAS
- 1.4
- L
- Mechanical resistance
- RMS
- 0.27
- N·s/m
- Nominal diameter
- 3.5
- ″
- 89
- mm
- Overall diameter
- 88
- mm
- Overall depth
- 47
- mm
- Volume occupied by the driver (estimated)
- 0.12
- L
- Net weight
- 0.525
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
![Fountek FR89EX SPL & Impedance](/Fountek/FR89EX/Fountek_FR89EX_(Frequency_response_+_Impedance).jpg)
![Fountek FR89EX Dimensions](/Fountek/FR89EX/Fountek_FR89EX_(Dimensions).jpg)
Export this driver to a simulation software:
![WinISD](/images/export/WinISD.png)
![Basta!](/images/export/Basta.png)
![Hornresp](/images/export/Hornresp.png)
![QSpeakers](/images/export/QSpeakers.png)
![SpeakerSim](/images/export/SpeakerSim.png)
![MfbLabs](/images/export/MfbLabs.png)
![Speakerbench](/images/export/Speakerbench.png)