Fountek FR58C
8Ω
Full-range
| Nominal diameter | 2.5″ / 58 mm |
| Resonance | 154 Hz |
| Q factor | 1.19 |
| Sensitivity | 83.1 dB |
| Linear excursion | ± 1.1 mm |
| Program Power | 10 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 83.1dB
- Frequency response 154 - 10000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 154Hz
- Mechanical quality factor QMS 2.37
- Electrical quality factor QES 2.39
- Total quality factor QTS 1.19
Large signal parameters
- Maximum linear excursion (one way) xmax 1.1mm
- Air volume displaced at xmax VD 2cm³
- Power handling P 5W
- Program power Pmax 10W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 6.4Ω
- Inductance (1kHz, estimated) LE 0.14mH
- VC Diameter 21.1mm
- Winding height HVC 5.2mm
- Winding material Copper Clad Aluminium
- Former material Kapton
Magnet
- Flux density B 0.7T
- Force factor Bl 1.61N/A
- Motor constant Bl/√RE 0.64N/√W
- Air gap height HAG 3mm
- Material Ferrite
Diaphragm
- Effective diameter 48mm
- Effective area SD 18.1cm²
- Moving mass MMS 1g
- Moving mass (without air load) MMD 0.9g
Suspensions
- Stiffness KMS 0.943N/mm
- Compliance CMS 1060µm/N
- Equivalent volume to the compliance VAS 0.493L
- Mechanical resistance RMS 0.41N·s/m
Dimensions
- Nominal diameter 2.5″
- 58mm
- Overall diameter 61mm
- Overall depth 39mm
- Net weight 0.213kg
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