P.Audio 15NX-76MB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.5dB
• Frequency response 40 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47Hz
• Mechanical quality factor QMS 8.58
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 406cm³
• Power handling P 550W
• Program power Pmax 1100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 0.51mH
• VC Diameter 76.2mm
• Winding height HVC 19mm
• Winding material Flat aluminium wire
• Former material Kapton

Magnet

• Flux density B 1.25T
• Force factor Bl 19.8N/A
• Motor constant Bl/√RE 7.94N/√W
• Air gap height HAG 9.5mm
• Material Neodymium

Diaphragm

• Effective diameter 331mm
• Effective area SD 855cm²
• Moving mass MMS 92.2g
• Moving mass (without air load) MMD 74.9g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 7.58N/mm
• Compliance CMS 132µm/N
• Equivalent volume to the compliance VAS 137L
• Mechanical resistance RMS 3.17N·s/m
• Surround material Cloth
• Spider material Cotton

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 386mm
• Baffle cutout diameter 353mm
• Overall depth 172mm
• Flange thickness 15mm
• Mounting depth 157mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 4.7kg
• Frame material Aluminium