P.Audio EX12-500S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB
• Frequency response 50 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 56Hz
• Mechanical quality factor QMS 6.46
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 3.9mm
• Air volume displaced at xmax VD 207cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.58mH
• VC Diameter 76.2mm
• Winding height HVC 16.8mm
• Winding material CCA-W
• Former material Kapton

Magnet

• Flux density B 1.1T
• Force factor Bl 16.3N/A
• Motor constant Bl/√RE 6.9N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 263mm
• Effective area SD 531cm²
• Moving mass MMS 54.5g
• Moving mass (without air load) MMD 45.8g
• Material Paper

Suspensions

• Stiffness KMS 7.35N/mm
• Compliance CMS 136µm/N
• Equivalent volume to the compliance VAS 54.5L
• Mechanical resistance RMS 2.97N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 153mm
• Flange thickness 9mm
• Mounting depth 144mm
• Volume occupied by the driver (estimated) 3.1L
• Net weight 7.0kg
• Frame material Steel