Celestion TF1530P

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.1dB
• Frequency response 35 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36.6Hz
• Mechanical quality factor QMS 5.37
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 525cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 1.06mH
• VC Diameter 75mm
• Winding height HVC 21mm
• Winding material Round Copper
• Former material Polyimide

Magnet

• Force factor Bl 14.3N/A
• Motor constant Bl/√RE 8.12N/√W
• Air gap height HAG 8mm
• Weight 2.3kg
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 808cm²
• Moving mass MMS 97.5g
• Moving mass (without air load) MMD 81.2g
• Material Kevlar

Suspensions

• Stiffness KMS 5.16N/mm
• Compliance CMS 194µm/N
• Equivalent volume to the compliance VAS 180L
• Mechanical resistance RMS 4.17N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 352mm
• Overall depth 160mm
• Volume occupied by the driver (estimated) 3.5L
• Net weight 6.8kg
• Frame material Pressed Steel