P.Audio 18FT-100XB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.6dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39Hz
• Mechanical quality factor QMS 9.90
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.52

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 674cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 1.12mH
• VC Diameter 99.3mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 23.8N/A
• Motor constant Bl/√RE 9.78N/√W
• Air gap height HAG 15mm
• Material Ferrite

Diaphragm

• Effective diameter 396mm
• Effective area SD 1225cm²
• Moving mass MMS 222g
• Moving mass (without air load) MMD 192g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 13.2N/mm
• Compliance CMS 76µm/N
• Equivalent volume to the compliance VAS 161L
• Mechanical resistance RMS 5.49N·s/m
• Surround material Cloth
• Spider material Cotton (Double silicone)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 466mm
• Baffle cutout diameter 426mm
• Overall depth 246mm
• Flange thickness 23mm
• Mounting depth 223mm
• Volume occupied by the driver (estimated) 8.2L
• Net weight 13.5kg
• Frame material Aluminium