Celestion TF0818

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
• Frequency response 70 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 100Hz
• Mechanical quality factor QMS 3.31
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 114cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.7Ω
• Inductance (1kHz) LE 0.75mH
• VC Diameter 44mm
• Winding height HVC 13mm
• Winding material Round copper
• Former material Polyimide

Magnet

• Force factor Bl 13N/A
• Motor constant Bl/√RE 5N/√W
• Air gap height HAG 6mm
• Weight 0.88kg
• Material Ferrite

Diaphragm

• Effective diameter 170mm
• Effective area SD 227cm²
• Moving mass MMS 19.6g
• Moving mass (without air load) MMD 17.1g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 9.44L
• Mechanical resistance RMS 3.72N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 208mm
• Baffle cutout diameter 183mm
• Overall depth 99mm
• Volume occupied by the driver (estimated) 0.87L
• Net weight 2.3kg
• Frame material Pressed steel