P.Audio 8NT-51MB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.8dB
• Frequency response 90 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 90Hz
• Mechanical quality factor QMS 4.67
• Electrical quality factor QES 0.66
• Total quality factor QTS 0.58

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 32cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.33mH
• VC Diameter 51.3mm
• Winding height HVC 11mm
• Winding material Flat aluminium wire
• Former material Kapton

Magnet

• Flux density B 1.25T
• Force factor Bl 11.1N/A
• Motor constant Bl/√RE 4.35N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 170mm
• Effective area SD 214cm²
• Moving mass MMS 22.5g
• Moving mass (without air load) MMD 20.1g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 7.25N/mm
• Compliance CMS 138µm/N
• Equivalent volume to the compliance VAS 8.95L
• Mechanical resistance RMS 2.73N·s/m
• Surround material Cloth
• Spider material Cotton

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 220mm
• Baffle cutout diameter 185mm
• Overall depth 110mm
• Flange thickness 14mm
• Mounting depth 96mm
• Volume occupied by the driver (estimated) 1.1L
• Frame material Aluminium