Precision Devices PDN.15BR40

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.8dB
• Frequency response 40 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39.2Hz
• Mechanical quality factor QMS 10.77
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 10.5mm
• Air volume displaced at xmax VD 871cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.89mH
• VC Diameter 101mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.37T
• Force factor Bl 19.1N/A
• Motor constant Bl/√RE 8.45N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 113g
• Moving mass (without air load) MMD 95.2g
• Material Paper

Suspensions

• Stiffness KMS 6.9N/mm
• Compliance CMS 145µm/N
• Equivalent volume to the compliance VAS 140L
• Mechanical resistance RMS 2.58N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 410mm
• Baffle cutout diameter 357mm
• Overall depth 163mm
• Flange thickness 10mm
• Mounting depth 153mm
• Volume occupied by the driver (estimated) 4.1L
• Net weight 7.8kg