Precision Devices PDN.12SB40

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 40 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49.9Hz
• Mechanical quality factor QMS 8.82
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 9.2mm
• Air volume displaced at xmax VD 489cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 101mm
• Winding height HVC 22mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.13T
• Force factor Bl 21N/A
• Motor constant Bl/√RE 9.07N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 88g
• Moving mass (without air load) MMD 78.9g
• Material Paper

Suspensions

• Stiffness KMS 8.65N/mm
• Compliance CMS 116µm/N
• Equivalent volume to the compliance VAS 45.8L
• Mechanical resistance RMS 3.13N·s/m
• Surround material Fabric

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 330mm
• Baffle cutout diameter 282mm
• Overall depth 141mm
• Flange thickness 10mm
• Mounting depth 131mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 6.75kg