Eminence KAPPA-12A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.9dB
• Frequency response 62 - 4200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 7.76
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 3.2mm
• Maximum excursion before damage xlim 11.5mm
• Air volume displaced at xmax VD 166cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.77mH
• VC Diameter 76.2mm
• Winding material Aluminum
• Former material Polyimide

Magnet

• Force factor Bl 15.2N/A
• Motor constant Bl/√RE 6.53N/√W
• Air gap height HAG 9.5mm
• Weight 2.268kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 42g
• Moving mass (without air load) MMD 33.5g
• Material Paper

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 112L
• Mechanical resistance RMS 1.53N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 311mm
• Baffle cutout diameter 279mm
• Overall depth 143mm
• Volume occupied by the driver 2.55L
• Net weight 6.759kg
• Frame material Pressed Steel