Fostex P650K
8Ω
Full-range
| Nominal diameter | 2.6″ / 65 mm |
| Resonance | 157 Hz |
| Q factor | 0.99 |
| Sensitivity | 83.1 dB |
| Linear excursion | ± 0.5 mm |
| Program Power | 15 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 83.1dB
- Frequency response 157 - 20000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 157Hz
- Mechanical quality factor QMS 3.39
- Electrical quality factor QES 1.40
- Total quality factor QTS 0.99
Large signal parameters
- Maximum linear excursion xmax 0.5mm
- Air volume displaced at xmax VD 1.1cm³
- Power handling P 5W
- Program power Pmax 15W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 7.3Ω
- Inductance (1kHz) LE 0.25mH
- VC Diameter 20mm
Magnet
- Force factor Bl 3.06N/A
- Motor constant Bl/√RE 1.13N/√W
- Weight 0.074kg
Diaphragm
- Effective diameter 52mm
- Effective area SD 21cm²
- Moving mass MMS 1.8g
- Moving mass (without air load) MMD 1.7g
Suspensions
- Stiffness KMS 1.74N/mm
- Compliance CMS 576µm/N
- Equivalent volume to the compliance VAS 0.35L
- Mechanical resistance RMS 0.52N·s/m
Dimensions
- Nominal diameter 2.6″
- 65mm
- Overall diameter 65mm
- Baffle cutout diameter 60mm
- Overall depth 38mm
- Net weight 0.249kg
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