Dayton Audio Reference RS125T-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.7dB
• Frequency response 75 - 9200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 76Hz
• Mechanical quality factor QMS 2.62
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 2.8mm
• Air volume displaced at xmax VD 15cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.58mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 5.04N/A
• Motor constant Bl/√RE 1.99N/√W
• Material Ferrite

Diaphragm

• Effective diameter 83mm
• Effective area SD 54.1cm²
• Moving mass MMS 5.1g
• Moving mass (without air load) MMD 4.8g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 1.15N/mm
• Compliance CMS 870µm/N
• Equivalent volume to the compliance VAS 3.56L
• Mechanical resistance RMS 0.93N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 5″
• 126mm
• Overall diameter 126mm
• Baffle cutout diameter 94mm
• Overall depth 55mm
• Volume occupied by the driver (estimated) 0.2L
• Frame material Cast Aluminium