Eminence 820H

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.8dB
• Frequency response 80 - 4600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 144Hz
• Mechanical quality factor QMS 18.78
• Electrical quality factor QES 0.92
• Total quality factor QTS 0.88

Large signal parameters

• Maximum linear excursion xmax 1.6mm
• Air volume displaced at xmax VD 37cm³
• Power handling P 20W
• Program power Pmax 40W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.33mH
• VC Diameter 25mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 5.74N/A
• Motor constant Bl/√RE 3.01N/√W
• Air gap height HAG 6.4mm
• Weight 0.425kg
• Material Ferrite

Diaphragm

• Effective diameter 171mm
• Effective area SD 231cm²
• Moving mass MMS 9g
• Moving mass (without air load) MMD 6.5g
• Material Paper

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 9.62L
• Mechanical resistance RMS 0.43N·s/m
• Surround material Full paper

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 209mm
• Baffle cutout diameter 181mm
• Overall depth 78mm
• Volume occupied by the driver 0.51L
• Net weight 1.41kg
• Frame material Pressed steel