P.Audio 18NT-100XB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.4dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 10.51
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 858cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.87mH
• VC Diameter 99.3mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.3T
• Force factor Bl 24.6N/A
• Motor constant Bl/√RE 10.9N/√W
• Air gap height HAG 11mm
• Material Neodymium

Diaphragm

• Effective diameter 396mm
• Effective area SD 1225cm²
• Moving mass MMS 205g
• Moving mass (without air load) MMD 175g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 12.5N/mm
• Compliance CMS 80µm/N
• Equivalent volume to the compliance VAS 171L
• Mechanical resistance RMS 4.91N·s/m
• Surround material Cloth
• Spider material Double Silicone

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