P.Audio BT15-800A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 45 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 48Hz
• Mechanical quality factor QMS 9.41
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.48

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 5.4Ω
• Inductance (1kHz) LE 0.77mH
• 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 17.3N/A
• Motor constant Bl/√RE 7.44N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 331mm
• Effective area SD 855cm²
• Moving mass MMS 94.6g
• Moving mass (without air load) MMD 77.1g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 8.07N/mm
• Compliance CMS 124µm/N
• Equivalent volume to the compliance VAS 128L
• Mechanical resistance RMS 3.03N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 390mm
• Baffle cutout diameter 350mm
• Overall depth 165mm
• Flange thickness 15mm
• Mounting depth 150mm
• Volume occupied by the driver (estimated) 4L
• Net weight 8.0kg
• Frame material Aluminium