Celestion TN0820

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93dB
• Frequency response 60 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 61.9Hz
• Mechanical quality factor QMS 1.56
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 45cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 50mm
• Winding height HVC 12mm
• Winding material Round copper
• Former material Polyimide

Magnet

• Force factor Bl 11.8N/A
• Motor constant Bl/√RE 4.97N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 170mm
• Effective area SD 227cm²
• Moving mass MMS 22g
• Moving mass (without air load) MMD 19.5g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 21.9L
• Mechanical resistance RMS 5.47N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 208mm
• Baffle cutout diameter 183mm
• Overall depth 100mm
• Volume occupied by the driver (estimated) 0.61L
• Net weight 1.3kg
• Frame material Pressed steel