P.Audio BT12-600A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.7dB
• Frequency response 60 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 6.14
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 3.9mm
• Air volume displaced at xmax VD 207cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.76mH
• 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 17.2N/A
• Motor constant Bl/√RE 7.02N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 262mm
• Effective area SD 531cm²
• Moving mass MMS 69.2g
• Moving mass (without air load) MMD 60.5g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 8.93N/mm
• Compliance CMS 112µm/N
• Equivalent volume to the compliance VAS 44.8L
• Mechanical resistance RMS 4.25N·s/m
• Surround material Cloth
• Spider material Cotton (Single)

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 314mm
• Baffle cutout diameter 283mm
• Overall depth 133mm
• Flange thickness 15mm
• Mounting depth 118mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 7.2kg
• Frame material Aluminium