Eminence ALPHA 5-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.2dB
• Frequency response 87 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 87Hz
• Mechanical quality factor QMS 11.81
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 5.9mm
• Maximum excursion before damage xlim 6.4mm
• Air volume displaced at xmax VD 61cm³
• Power handling P 125W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 0.29mH
• VC Diameter 38.1mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 6.22N/A
• Motor constant Bl/√RE 2.78N/√W
• Air gap height HAG 5.8mm
• Weight 0.567kg
• Material Ferrite

Diaphragm

• Effective diameter 114mm
• Effective area SD 103cm²
• Moving mass MMS 8g
• Moving mass (without air load) MMD 7.2g
• Material Water resistant pulp

Suspensions

• Stiffness KMS 2.38N/mm
• Compliance CMS 420µm/N
• Equivalent volume to the compliance VAS 6.14L
• Mechanical resistance RMS 0.37N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 5″
• 127mm
• Overall diameter 149mm
• Baffle cutout diameter 122mm
• Overall depth 74mm
• Volume occupied by the driver 30.9L
• Net weight 1.406kg
• Frame material Pressed Steel