Celestion TF0512HE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB
• Frequency response 55 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 84.7Hz
• Mechanical quality factor QMS 9.23
• Electrical quality factor QES 0.57
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 37cm³
• Power handling P 75W
• Program power Pmax 150W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.28mH
• VC Diameter 31.8mm
• Winding height HVC 12.5mm
• Winding material Copper clad aluminium
• Former material Polyimide

Magnet

• Force factor Bl 6.71N/A
• Motor constant Bl/√RE 2.88N/√W
• Air gap height HAG 6mm
• Weight 0.48kg
• Material Ferrite

Diaphragm

• Effective diameter 100mm
• Effective area SD 78.5cm²
• Moving mass MMS 8.89g
• Moving mass (without air load) MMD 8.3g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 2.56N/mm
• Compliance CMS 390µm/N
• Equivalent volume to the compliance VAS 3.46L
• Mechanical resistance RMS 0.51N·s/m
• Surround material Elastomer

Dimensions

• Nominal diameter 5″
• 125mm
• Overall diameter 151mm
• Baffle cutout diameter 117mm
• Overall depth 72mm
• Volume occupied by the driver (estimated) 0.42L
• Net weight 1.4kg
• Frame material Pressed steel