Dayton Audio Reference RS270-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 27 - 2040Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 29.6Hz
• Mechanical quality factor QMS 2.08
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 6.6mm
• Air volume displaced at xmax VD 229cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.8Ω
• Inductance (1kHz) LE 0.93mH
• VC Diameter 50mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 10.3N/A
• Motor constant Bl/√RE 3.95N/√W
• Material Ferrite

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 50.5g
• Moving mass (without air load) MMD 45.6g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 1.75N/mm
• Compliance CMS 570µm/N
• Equivalent volume to the compliance VAS 96.5L
• Mechanical resistance RMS 4.52N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 272mm
• Overall diameter 272mm
• Baffle cutout diameter 236mm
• Overall depth 113mm
• Volume occupied by the driver (estimated) 1.5L
• Frame material Cast Aluminium