Eminence ALPHA 2-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.5dB
• Frequency response 200 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 186Hz
• Mechanical quality factor QMS 3.06
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 1.7mm
• Maximum excursion before damage xlim 2.2mm
• Air volume displaced at xmax VD 2.1cm³
• Power handling P 20W
• Program power Pmax 30W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.13mH
• VC Diameter 16mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 2.64N/A
• Motor constant Bl/√RE 1.04N/√W
• Air gap height HAG 3mm
• Weight 0.085kg

Diaphragm

• Effective diameter 40mm
• Effective area SD 12.4cm²
• Moving mass MMS 1g
• Moving mass (without air load) MMD 1g

Suspensions

• Stiffness KMS 1.19N/mm
• Compliance CMS 840µm/N
• Equivalent volume to the compliance VAS 0.18L
• Mechanical resistance RMS 0.38N·s/m
• Surround material Paper/Poly Sandwich

Dimensions

• Nominal diameter 2″
• 51mm
• Overall diameter 54mm
• Baffle cutout diameter 51mm
• Volume occupied by the driver 0.03L
• Net weight 0.18kg
• Frame material Pressed steel