P.Audio C18-1000 v3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.7dB
• Frequency response 40 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 11.02
• Electrical quality factor QES 0.77
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 643cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.12mH
• VC Diameter 114.4mm
• Winding height HVC 25.5mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 0.9T
• Force factor Bl 22.9N/A
• Motor constant Bl/√RE 9.51N/√W
• Air gap height HAG 15mm
• Material Ferrite

Diaphragm

• Effective diameter 395mm
• Effective area SD 1225cm²
• Moving mass MMS 277g
• Moving mass (without air load) MMD 247g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 18.2N/mm
• Compliance CMS 55µm/N
• Equivalent volume to the compliance VAS 118L
• Mechanical resistance RMS 6.47N·s/m
• Surround material Cloth
• Spider material Cotton (Double Silicone)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 466mm
• Baffle cutout diameter 426mm
• Overall depth 230mm
• Flange thickness 19mm
• Mounting depth 211mm
• Volume occupied by the driver (estimated) 8.6L
• Net weight 15.5kg
• Frame material Aluminium