Celestion FTR08-2011D

• 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 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 MMS 27.8g
• Moving mass (without air load) 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