Precision Devices PD.15BR40

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.2dB
• Frequency response 40 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38.4Hz
• Mechanical quality factor QMS 9.58
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.32

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 5.2Ω
• Inductance (1kHz) LE 1.04mH
• VC Diameter 101mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.34T
• Force factor Bl 21.4N/A
• Motor constant Bl/√RE 9.37N/√W
• Air gap height HAG 9mm
• Material Ceramic

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 119g
• Moving mass (without air load) MMD 101g
• Material Paper

Suspensions

• Stiffness KMS 6.9N/mm
• Compliance CMS 145µm/N
• Equivalent volume to the compliance VAS 140L
• Mechanical resistance RMS 2.99N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 410mm
• Baffle cutout diameter 357mm
• Overall depth 158mm
• Flange thickness 10mm
• Mounting depth 148mm
• Volume occupied by the driver (estimated) 5.6L
• Net weight 13.3kg