P.Audio EX12-300S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.1dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 66Hz
• Mechanical quality factor QMS 3.34
• Electrical quality factor QES 0.64
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 3.1mm
• Air volume displaced at xmax VD 165cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 63.7mm
• Winding height HVC 16.2mm
• Winding material CCA-W
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 13.7N/A
• Motor constant Bl/√RE 5.7N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 259mm
• Effective area SD 531cm²
• Moving mass MMS 50.5g
• Moving mass (without air load) MMD 41.8g
• Material Paper

Suspensions

• Stiffness KMS 8.7N/mm
• Compliance CMS 115µm/N
• Equivalent volume to the compliance VAS 45.9L
• Mechanical resistance RMS 6.26N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 148mm
• Flange thickness 9mm
• Mounting depth 139mm
• Volume occupied by the driver (estimated) 2.3L
• Net weight 4.7kg
• Frame material Steel