Fountek FR58EX
Full-range
2.5″ / 58 mm
Nominal diameter
134 Hz
Resonance
0.55
Q factor
82 dB
Sensitivity
± 2.9 mm
Linear excursion
30 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 82.1
- dB
- Frequency response
- 130 - 20000
- Hz
- Resonance frequency (free air)
- fS
- 134
- Hz
- Mechanical quality factor
- QMS
- 2.60
- Electrical quality factor
- QES
- 0.69
- Total quality factor
- QTS
- 0.55
- Maximum linear excursion
- xmax
- 2.9
- mm
- Air volume displaced at xmax
- VD
- 5.0
- cm³
- Power handling
- P
- 15
- W
- Program power
- Pmax
- 30
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 6.4
- Ω
- Inductance (1kHz, estimated)
- LE
- 0.13
- mH
- VC Diameter
- 20
- mm
- Winding height
- HVC
- 8.9
- mm
- Winding material
- Copper
- Former material
- Aluminum
- Flux density
- B
- 1.16
- T
- Force factor
- Bl
- 3.89
- N/A
- Motor constant
- Bl/√RE
- 1.54
- N/√W
- Air gap height
- HAG
- 3
- mm
- Material
- Neodymium
- Effective diameter
- 47
- mm
- Effective area
- SD
- 17
- cm²
- Moving mass
- MMS
- 1.9
- g
- Moving mass (without air load)
- MMD
- 1.9
- g
- Stiffness
- KMS
- 1.36
- N/mm
- Compliance
- CMS
- 737
- µm/N
- Equivalent volume to the compliance
- VAS
- 0.315
- L
- Mechanical resistance
- RMS
- 0.62
- N·s/m
- Nominal diameter
- 2.5
- ″
- 58
- mm
- Overall diameter
- 62
- mm
- Overall depth
- 35
- mm
- Net weight
- 0.14
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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