Rockford Fosgate T1S1-12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85dB

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 11.22
• Electrical quality factor QES 1.17
• Total quality factor QTS 1.06

Large signal parameters

• Maximum linear excursion xmax 15mm
• Air volume displaced at xmax VD 840cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 1Ω
• DC resistance RE 1.7Ω
• Inductance (1kHz) LE 0.31mH
• VC Diameter 76mm

Magnet

• Force factor Bl 9.3N/A
• Motor constant Bl/√RE 7.13N/√W
• Weight 0.41kg

Diaphragm

• Effective diameter 267mm
• Effective area SD 560cm²
• Moving mass MMS 254g
• Moving mass (without air load) MMD 245g

Suspensions

• Stiffness KMS 13.7N/mm
• Compliance CMS 73µm/N
• Equivalent volume to the compliance VAS 32.4L
• Mechanical resistance RMS 5.25N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 285mm
• Mounting depth 77mm
• Volume occupied by the driver 1.19L