Eminence BETA-15A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.6dB
• Frequency response 45 - 3700Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 8.10
• Electrical quality factor QES 0.63
• Total quality factor QTS 0.58

Large signal parameters

• Maximum linear excursion xmax 4mm
• Maximum excursion before damage xlim 11.6mm
• Air volume displaced at xmax VD 330cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 50.8mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 11.5N/A
• Motor constant Bl/√RE 4.57N/√W
• Air gap height HAG 7.9mm
• Weight 0.964kg
• Material Ferrite

Diaphragm

• Effective diameter 324mm
• Effective area SD 824cm²
• Moving mass MMS 60g
• Moving mass (without air load) MMD 43.4g
• Material Paper

Suspensions

• Stiffness KMS 2.86N/mm
• Compliance CMS 350µm/N
• Equivalent volume to the compliance VAS 335L
• Mechanical resistance RMS 1.63N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 352mm
• Overall depth 154mm
• Volume occupied by the driver 3.34L
• Net weight 3.992kg
• Frame material Pressed Steel