Eminence DELTA-12LFA

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 44 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 7.28
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Maximum excursion before damage xlim 13.5mm
• Air volume displaced at xmax VD 243cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 1.45mH
• VC Diameter 63.5mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 14.1N/A
• Motor constant Bl/√RE 5.73N/√W
• Air gap height HAG 9.5mm
• Weight 1.588kg
• Material Ferrite

Diaphragm

• Effective diameter 254mm
• Effective area SD 507cm²
• Moving mass MMS 51g
• Moving mass (without air load) MMD 42.9g
• Material Paper

Suspensions

• Stiffness KMS 5.26N/mm
• Compliance CMS 190µm/N
• Equivalent volume to the compliance VAS 67.9L
• Mechanical resistance RMS 2.24N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 306mm
• Baffle cutout diameter 281mm
• Overall depth 136mm
• Volume occupied by the driver 2.24L
• Net weight 5.352kg
• Frame material Pressed Steel