Eminence DELTA PRO-12A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB
• Frequency response 52 - 4500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 7.56
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 4.6mm
• Maximum excursion before damage xlim 13.7mm
• Air volume displaced at xmax VD 245cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.84mH
• VC Diameter 63.5mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 15.3N/A
• Motor constant Bl/√RE 6.4N/√W
• Air gap height HAG 9.5mm
• Weight 2.268kg
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 532cm²
• Moving mass MMS 48g
• Moving mass (without air load) MMD 39.2g
• Material Paper

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 81.7L
• Mechanical resistance RMS 2.03N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 314mm
• Baffle cutout diameter 281mm
• Overall depth 158mm
• Volume occupied by the driver 2.55L
• Net weight 7.394kg
• Frame material Die-cast Aluminium