Celestion TFX0412

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB
• Frequency response 90 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 95Hz
• Mechanical quality factor QMS 5.18
• Electrical quality factor QES 0.67
• Total quality factor QTS 0.59

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 23cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.34mH
• VC Diameter 32mm
• Winding height HVC 11mm
• Winding material Copper clad aluminium
• Former material Polyimide

Magnet

• Force factor Bl 5.4N/A
• Motor constant Bl/√RE 2.28N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 85mm
• Effective area SD 56.8cm²
• Moving mass MMS 5.8g
• Moving mass (without air load) MMD 5.4g
• Material Reinforced cellulose, waterproof coating

Suspensions

• Stiffness KMS 2.09N/mm
• Compliance CMS 478µm/N
• Equivalent volume to the compliance VAS 2.18L
• Mechanical resistance RMS 0.674N·s/m
• Surround material Elastomer

Dimensions

• Nominal diameter 4″
• 100mm
• Overall diameter 126mm
• Baffle cutout diameter 102mm
• Overall depth 74mm
• Volume occupied by the driver (estimated) 0.48L
• Net weight 2.0kg
• Frame material Pressed steel