Celestion TFX0515

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.8dB
• Frequency response 80 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 74Hz
• Mechanical quality factor QMS 8.29
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 3.8mm
• Air volume displaced at xmax VD 36cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.363mH
• VC Diameter 38mm
• Winding height HVC 10.5mm
• Winding material Round copper
• Former material Polyimide

Magnet

• Force factor Bl 6.96N/A
• Motor constant Bl/√RE 2.9N/√W
• Air gap height HAG 6mm
• Weight 0.65kg
• Material Ferrite

Diaphragm

• Effective diameter 110mm
• Effective area SD 95cm²
• Moving mass MMS 9.07g
• Moving mass (without air load) MMD 8.4g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 1.97N/mm
• Compliance CMS 509µm/N
• Equivalent volume to the compliance VAS 6.53L
• Mechanical resistance RMS 0.509N·s/m
• Surround material Elastomer

Dimensions

• Nominal diameter 5″
• 125mm
• Overall size 136 x 151mm
• Baffle cutout diameter 116mm
• Overall depth 72mm
• Volume occupied by the driver (estimated) 0.43L
• Net weight 1.6kg
• Frame material Pressed steel