P.Audio 8NT-65MB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92dB
• Frequency response 80 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 81Hz
• Mechanical quality factor QMS 5.25
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 3.8mm
• Air volume displaced at xmax VD 80cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.35mH
• VC Diameter 63.7mm
• Winding height HVC 15.5mm
• Winding material Flat aluminium wire
• Former material Kapton

Magnet

• Flux density B 1.25T
• Force factor Bl 13.8N/A
• Motor constant Bl/√RE 5.41N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 168mm
• Effective area SD 214cm²
• Moving mass MMS 27.1g
• Moving mass (without air load) MMD 24.7g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 7.04N/mm
• Compliance CMS 142µm/N
• Equivalent volume to the compliance VAS 9.19L
• Mechanical resistance RMS 2.62N·s/m
• Surround material Cloth
• Spider material Cotton

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 220mm
• Baffle cutout diameter 185mm
• Overall depth 118mm
• Flange thickness 16mm
• Mounting depth 102mm
• Volume occupied by the driver (estimated) 1.2L
• Frame material Aluminium