P.Audio 18NT-100SW

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 11.67
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 1103cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.05mH
• VC Diameter 99.3mm
• Winding height HVC 29mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.3T
• Force factor Bl 25.2N/A
• Motor constant Bl/√RE 10.5N/√W
• Air gap height HAG 11mm
• Material Neodymium

Diaphragm

• Effective diameter 397mm
• Effective area SD 1225cm²
• Moving mass MMS 212g
• Moving mass (without air load) MMD 182g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 14.7N/mm
• Compliance CMS 68µm/N
• Equivalent volume to the compliance VAS 145L
• Mechanical resistance RMS 4.68N·s/m
• Surround material Cloth
• Spider material Cotton (Silicone impregnated)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 466mm
• Baffle cutout diameter 426mm
• Overall depth 258mm
• Flange thickness 23mm
• Mounting depth 235mm
• Volume occupied by the driver (estimated) 6.8L
• Net weight 9.5kg
• Frame material Aluminium