Dayton Audio Reference RS180S-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.6dB
• Frequency response 41 - 3600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37.7Hz
• Mechanical quality factor QMS 1.45
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 75cm³
• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.79mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 7.28N/A
• Motor constant Bl/√RE 2.88N/√W
• Material Ferrite

Diaphragm

• Effective diameter 126mm
• Effective area SD 125cm²
• Moving mass MMS 17g
• Moving mass (without air load) MMD 15.9g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 0.952N/mm
• Compliance CMS 1050µm/N
• Equivalent volume to the compliance VAS 23L
• Mechanical resistance RMS 2.78N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 7″
• 181mm
• Overall diameter 181mm
• Baffle cutout diameter 146mm
• Overall depth 98mm
• Volume occupied by the driver (estimated) 0.7L
• Frame material Cast Aluminium