Eminence ALPHA 3-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB
• Frequency response 150 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 118Hz
• Mechanical quality factor QMS 7.94
• Electrical quality factor QES 0.53
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 2.4mm
• Maximum excursion before damage xlim 4mm
• Air volume displaced at xmax VD 6.9cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.11mH
• VC Diameter 20mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 3.93N/A
• Motor constant Bl/√RE 1.74N/√W
• Air gap height HAG 2.5mm
• Weight 0.227kg
• Material Ferrite

Diaphragm

• Effective diameter 60mm
• Effective area SD 28.6cm²
• Moving mass MMS 2g
• Moving mass (without air load) MMD 1.9g
• Material Paper/Poly sandwich

Suspensions

• Stiffness KMS 1.19N/mm
• Compliance CMS 840µm/N
• Equivalent volume to the compliance VAS 0.95L
• Mechanical resistance RMS 0.19N·s/m
• Surround material Poly

Dimensions

• Nominal diameter 3″
• 76mm
• Overall diameter 101mm
• Baffle cutout diameter 77mm
• Overall depth 45mm
• Volume occupied by the driver 0.14L
• Net weight 0.408kg
• Frame material Pressed Steel