Dayton Audio Reference RS225-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.6dB
• Frequency response 28 - 2400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28.3Hz
• Mechanical quality factor QMS 1.46
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 150cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.86mH
• VC Diameter 38mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 9.05N/A
• Motor constant Bl/√RE 3.55N/√W
• Material Ferrite

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 35.8g
• Moving mass (without air load) MMD 33.4g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 1.14N/mm
• Compliance CMS 880µm/N
• Equivalent volume to the compliance VAS 56.8L
• Mechanical resistance RMS 4.36N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 8″
• 223mm
• Overall diameter 223mm
• Baffle cutout diameter 184mm
• Overall depth 89mm
• Volume occupied by the driver (estimated) 0.82L
• Frame material Cast Aluminium