Eminence KAPPA PRO-12A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95dB
• Frequency response 57 - 2800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 6.93
• Electrical quality factor QES 0.25
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Maximum excursion before damage xlim 14.8mm
• Air volume displaced at xmax VD 249cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.22mH
• VC Diameter 76.2mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 17.3N/A
• Motor constant Bl/√RE 7.4N/√W
• Air gap height HAG 9.5mm
• Weight 2.268kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 59g
• Moving mass (without air load) MMD 50.5g
• Material Paper

Suspensions

• Stiffness KMS 3.13N/mm
• Compliance CMS 320µm/N
• Equivalent volume to the compliance VAS 121L
• Mechanical resistance RMS 1.98N·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 7.53kg
• Frame material Die-cast Aluminium