Celestion TF1530e

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98dB
• Frequency response 40 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43.6Hz
• Mechanical quality factor QMS 2.76
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 556cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 0.79mH
• VC Diameter 75mm
• Winding height HVC 17mm
• Winding material Edgewound copper clad aluminium
• Former material Glass Fibre

Magnet

• Force factor Bl 17N/A
• Motor constant Bl/√RE 7.27N/√W
• Air gap height HAG 8mm
• Weight 2.44kg
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 71.9g
• Moving mass (without air load) MMD 54.6g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 5.26N/mm
• Compliance CMS 190µm/N
• Equivalent volume to the compliance VAS 192L
• Mechanical resistance RMS 7.15N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 352mm
• Overall depth 161mm
• Volume occupied by the driver (estimated) 3.5L
• Net weight 6.5kg
• Frame material Pressed steel