Rockford Fosgate P1S2-15

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 23Hz
• Mechanical quality factor QMS 3.46
• Electrical quality factor QES 0.80
• Total quality factor QTS 0.55

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 788cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 1.8Ω
• Inductance (1kHz) LE 1.12mH
• VC Diameter 51mm

Magnet

• Force factor Bl 9.4N/A
• Motor constant Bl/√RE 7.01N/√W
• Weight 1.7kg

Diaphragm

• Effective diameter 334mm
• Effective area SD 876cm²
• Moving mass MMS 272g
• Moving mass (without air load) MMD 255g

Suspensions

• Stiffness KMS 5.68N/mm
• Compliance CMS 176µm/N
• Equivalent volume to the compliance VAS 192L
• Mechanical resistance RMS 11.4N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Baffle cutout diameter 352mm
• Mounting depth 177mm
• Volume occupied by the driver 4.19L