Eminence DELTA-12A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.2dB
• Frequency response 54 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 5.27
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 2.4mm
• Maximum excursion before damage xlim 9.9mm
• Air volume displaced at xmax VD 125cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.74mH
• VC Diameter 63.5mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 13.5N/A
• Motor constant Bl/√RE 5.38N/√W
• Air gap height HAG 9.5mm
• Weight 1.588kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 39g
• Moving mass (without air load) MMD 30.7g
• Material Paper

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 81.3L
• Mechanical resistance RMS 2.56N·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 5.171kg
• Frame material Pressed Steel