P.Audio 15BM-300B v3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.8dB
• Frequency response 45 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 48Hz
• Mechanical quality factor QMS 5.39
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 3.9mm
• Air volume displaced at xmax VD 334cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.44mH
• VC Diameter 76.2mm
• Winding height HVC 16.8mm
• Winding material CCA-W
• Former material Glass fiber

Magnet

• Flux density B 1.2T
• Force factor Bl 19.2N/A
• Motor constant Bl/√RE 8.04N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 331mm
• Effective area SD 855cm²
• Moving mass MMS 92.2g
• Moving mass (without air load) MMD 74.6g
• Material Paper

Suspensions

• Stiffness KMS 8.4N/mm
• Compliance CMS 119µm/N
• Equivalent volume to the compliance VAS 123L
• Mechanical resistance RMS 5.16N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 392mm
• Baffle cutout diameter 353mm
• Overall depth 167mm
• Flange thickness 16mm
• Mounting depth 151mm
• Volume occupied by the driver (estimated) 4.1L
• Net weight 8.0kg
• Frame material Aluminium