Eminence ALPHA-15A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.3dB
• Frequency response 46 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 7.23
• Electrical quality factor QES 1.53
• Total quality factor QTS 1.26

Large signal parameters

• Maximum linear excursion xmax 3.8mm
• Maximum excursion before damage xlim 8.4mm
• Air volume displaced at xmax VD 325cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 0.84mH
• VC Diameter 38.1mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 7.7N/A
• Motor constant Bl/√RE 3.18N/√W
• Air gap height HAG 6.4mm
• Weight 0.567kg
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 856cm²
• Moving mass MMS 59g
• Moving mass (without air load) MMD 41.7g
• Material Paper

Suspensions

• Stiffness KMS 4N/mm
• Compliance CMS 250µm/N
• Equivalent volume to the compliance VAS 260L
• Mechanical resistance RMS 2.1N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 352mm
• Overall depth 148mm
• Volume occupied by the driver 3.2L
• Net weight 3.039kg
• Frame material Pressed Steel