Eminence ALPHA-8A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.5dB
• Frequency response 58 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 4.60
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.59

Large signal parameters

• Maximum linear excursion xmax 3.2mm
• Maximum excursion before damage xlim 7.1mm
• Air volume displaced at xmax VD 67cm³
• Power handling P 125W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.44mH
• VC Diameter 38.1mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 7.8N/A
• Motor constant Bl/√RE 3.39N/√W
• Air gap height HAG 6.4mm
• Weight 0.567kg
• Material Ferrite

Diaphragm

• Effective diameter 164mm
• Effective area SD 210cm²
• Moving mass MMS 17g
• Moving mass (without air load) MMD 14.7g
• Material Paper

Suspensions

• Stiffness KMS 3.57N/mm
• Compliance CMS 280µm/N
• Equivalent volume to the compliance VAS 17.7L
• Mechanical resistance RMS 1.7N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 209mm
• Baffle cutout diameter 181mm
• Overall depth 83mm
• Volume occupied by the driver 0.57L
• Net weight 1.95kg
• Frame material Pressed Steel