Precision Devices PDN.12MH25

• Sensitivity (1W, 1m, infinite baffle) SPL1W 100dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 58.1Hz
• Mechanical quality factor QMS 9.45
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 2.6mm
• Air volume displaced at xmax VD 138cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.41mH
• VC Diameter 63mm
• Winding height HVC 11mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.67T
• Force factor Bl 20.5N/A
• Motor constant Bl/√RE 8.32N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 46g
• Moving mass (without air load) MMD 36.9g
• Material Paper

Suspensions

• Stiffness KMS 6.15N/mm
• Compliance CMS 163µm/N
• Equivalent volume to the compliance VAS 64.5L
• Mechanical resistance RMS 1.78N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 330mm
• Baffle cutout diameter 282mm
• Overall depth 113mm
• Flange thickness 10mm
• Mounting depth 103mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.5kg