P.Audio C12-500MB v2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 60 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 62Hz
• Mechanical quality factor QMS 6.66
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 246cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.31mH
• VC Diameter 99.3mm
• Winding height HVC 16.9mm
• Winding material CCA-R
• Former material Glass fiber

Magnet

• Flux density B 1.3T
• Force factor Bl 20N/A
• Motor constant Bl/√RE 8.32N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 262mm
• Effective area SD 552cm²
• Moving mass MMS 75.8g
• Moving mass (without air load) MMD 66.7g
• Material Paper

Suspensions

• Stiffness KMS 11.4N/mm
• Compliance CMS 88µm/N
• Equivalent volume to the compliance VAS 38L
• Mechanical resistance RMS 4.37N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 314mm
• Baffle cutout diameter 283mm
• Overall depth 131mm
• Flange thickness 16mm
• Mounting depth 115mm
• Volume occupied by the driver (estimated) 3.4L
• Net weight 9.7kg
• Frame material Aluminium