Eminence BETA-12A-2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.1dB
• Frequency response 43 - 3800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47Hz
• Mechanical quality factor QMS 6.00
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 4.4mm
• Maximum excursion before damage xlim 11mm
• Air volume displaced at xmax VD 237cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 0.64mH
• VC Diameter 51mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 10.8N/A
• Motor constant Bl/√RE 4.83N/√W
• Air gap height HAG 7.9mm
• Weight 1.077kg
• Material Ferrite

Diaphragm

• Effective diameter 262mm
• Effective area SD 539cm²
• Moving mass MMS 40g
• Moving mass (without air load) MMD 31.3g
• Material Paper

Suspensions

• Stiffness KMS 3.45N/mm
• Compliance CMS 290µm/N
• Equivalent volume to the compliance VAS 120L
• Mechanical resistance RMS 1.97N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 306mm
• Baffle cutout diameter 281mm
• Overall depth 140mm
• Volume occupied by the driver 2L
• Net weight 3.4kg
• Frame material Pressed steel