Eminence BETA-8A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 78 - 4500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 65Hz
• Mechanical quality factor QMS 4.95
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 7.4mm
• Air volume displaced at xmax VD 63cm³
• Power handling P 225W
• Program power Pmax 450W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.49mH
• VC Diameter 50.8mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 9.6N/A
• Motor constant Bl/√RE 3.92N/√W
• Air gap height HAG 7.9mm
• Weight 0.964kg
• Material Ferrite

Diaphragm

• Effective diameter 164mm
• Effective area SD 210cm²
• Moving mass MMS 16g
• Moving mass (without air load) MMD 13.7g
• Material Paper

Suspensions

• Stiffness KMS 2.7N/mm
• Compliance CMS 370µm/N
• Equivalent volume to the compliance VAS 23.3L
• Mechanical resistance RMS 1.32N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 209mm
• Baffle cutout diameter 181mm
• Overall depth 89mm
• Volume occupied by the driver 0.76L
• Net weight 2.994kg
• Frame material Pressed Steel