Dayton Audio Reference RS180P-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.3dB
• Frequency response 45 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45.8Hz
• Mechanical quality factor QMS 1.49
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 76cm³
• Power handling P 60W
• Program power Pmax 90W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.84mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 7.16N/A
• Motor constant Bl/√RE 2.85N/√W
• Material Ferrite

Diaphragm

• Effective diameter 127mm
• Effective area SD 127cm²
• Moving mass MMS 12.4g
• Moving mass (without air load) MMD 11.3g
• Material Paper / Kevlar

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 22L
• Mechanical resistance RMS 2.39N·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