Rockford Fosgate R1S4-10

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33.5Hz
• Mechanical quality factor QMS 8.55
• Electrical quality factor QES 0.62
• Total quality factor QTS 0.58

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 236cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 2mH
• VC Diameter 51mm

Magnet

• Force factor Bl 10.6N/A
• Motor constant Bl/√RE 5.67N/√W
• Weight 0.96kg

Diaphragm

• Effective diameter 207mm
• Effective area SD 337cm²
• Moving mass MMS 95.2g
• Moving mass (without air load) MMD 90.7g

Suspensions

• Stiffness KMS 4.22N/mm
• Compliance CMS 237µm/N
• Equivalent volume to the compliance VAS 38.1L
• Mechanical resistance RMS 2.34N·s/m

Dimensions

• Nominal diameter 10″
• 257mm
• Overall diameter 257mm
• Baffle cutout diameter 230mm
• Mounting depth 112mm
• Volume occupied by the driver 1.7L