Dayton Audio Reference RS180-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.8dB
• Frequency response 39 - 3600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35.7Hz
• Mechanical quality factor QMS 1.22
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.31

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 0.73mH
• VC Diameter 38mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 7.82N/A
• Motor constant Bl/√RE 3.09N/√W
• Material Ferrite

Diaphragm

• Effective diameter 126mm
• Effective area SD 125cm²
• Moving mass MMS 17.9g
• Moving mass (without air load) MMD 16.8g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 0.893N/mm
• Compliance CMS 1120µm/N
• Equivalent volume to the compliance VAS 24.4L
• Mechanical resistance RMS 3.29N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 7″
• 181mm
• Overall diameter 181mm
• Baffle cutout diameter 146mm
• Overall depth 81mm
• Volume occupied by the driver (estimated) 0.55L
• Frame material Cast Aluminium