Celestion FTR08-2011D
8Ω
Low frequency
| Nominal diameter | 8″ / 200 mm |
| Resonance | 86.1 Hz |
| Q factor | 0.44 |
| Sensitivity | 91.9 dB |
| Linear excursion | ± 5.5 mm |
| Program power | 400 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 91.9dB
- Frequency response 70 - 6000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 86.1Hz
- Mechanical quality factor QMS 2.24
- Electrical quality factor QES 0.54
- Total quality factor QTS 0.44
Large signal parameters
- Maximum linear excursion (one way) xmax 5.5mm
- Air volume displaced at xmax VD 125cm³
- Power handling P 200W
- Program power Pmax 400W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.8Ω
- Inductance (1kHz) LE 0.38mH
- VC Diameter 50mm
- Winding height HVC 15mm
- Winding material Round copper
- Former material Polyimide
Magnet
- Force factor Bl 12.7N/A
- Motor constant Bl/√RE 5.27N/√W
- Air gap height HAG 8mm
- Weight 1.2kg
- Material Ferrite
Diaphragm
- Effective diameter 170mm
- Effective area SD 227cm²
- Moving mass (including air load) MMS 27.8g
- Moving mass MMD 25.1g
- Material Kevlar loaded paper
Suspensions
- Stiffness KMS 8.33N/mm
- Compliance CMS 120µm/N
- Equivalent volume to the compliance VAS 8.99L
- Mechanical resistance RMS 6.71N·s/m
- Surround material Cloth-sealed
Dimensions
- Nominal diameter 8″
- 200mm
- Overall diameter 225mm
- Baffle cutout diameter 187mm
- Overall depth 102mm
- Volume occupied by the driver (estimated) 1.3L
- Net weight 3.65kg
- Frame material Cast aluminium
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