P.Audio 18FT-100SW

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.5dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 9.73
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Air volume displaced at xmax VD 919cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 1.28mH
• VC Diameter 99.3mm
• Winding height HVC 29mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 23.1N/A
• Motor constant Bl/√RE 9.77N/√W
• Air gap height HAG 14mm
• Material Ferrite

Diaphragm

• Effective diameter 396mm
• Effective area SD 1225cm²
• Moving mass MMS 199g
• Moving mass (without air load) MMD 169g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 11.5N/mm
• Compliance CMS 87µm/N
• Equivalent volume to the compliance VAS 186L
• Mechanical resistance RMS 4.88N·s/m
• Surround material Cloth
• Spider material Cotton (Double silicone)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 466mm
• Baffle cutout diameter 426mm
• Overall depth 251mm
• Flange thickness 23mm
• Mounting depth 228mm
• Volume occupied by the driver (estimated) 8.6L
• Net weight 14.3kg
• Frame material Aluminium