Celestion TFX0615

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 100 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 96.8Hz
• Mechanical quality factor QMS 3.04
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 81cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.46mH
• VC Diameter 38mm
• Winding height HVC 13.5mm
• Winding material Round copper
• Former material Polyimide

Magnet

• Force factor Bl 9.82N/A
• Motor constant Bl/√RE 4.23N/√W
• Air gap height HAG 6mm
• Weight 0.81kg
• Material Ferrite

Diaphragm

• Effective diameter 140mm
• Effective area SD 154cm²
• Moving mass MMS 12.6g
• Moving mass (without air load) MMD 11.2g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 7.18L
• Mechanical resistance RMS 2.53N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 178mm
• Baffle cutout diameter 145mm
• Overall depth 76mm
• Volume occupied by the driver (estimated) 0.63L
• Net weight 2.1kg
• Frame material Pressed steel