Rockford Fosgate P3D2-12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 26.5Hz
• Mechanical quality factor QMS 6.70
• Electrical quality factor QES 0.53
• Total quality factor QTS 0.49

Large signal parameters

• Maximum linear excursion xmax 15.2mm
• Air volume displaced at xmax VD 866cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.2Ω
• Inductance (1kHz, in series) LE 4.25mH
• VC Diameter 64mm

Magnet

• Force factor (in series) Bl 17N/A
• Motor constant Bl/√RE 9.5N/√W
• Weight 2.72kg

Diaphragm

• Effective diameter 269mm
• Effective area SD 570cm²
• Moving mass MMS 289g
• Moving mass (without air load) MMD 280g

Suspensions

• Stiffness KMS 8N/mm
• Compliance CMS 125µm/N
• Equivalent volume to the compliance VAS 57.7L
• Mechanical resistance RMS 7.17N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 285mm
• Mounting depth 169mm
• Volume occupied by the driver 3L