Dayton Audio Classic DC250-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB
• Frequency response 25 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 24.9Hz
• Mechanical quality factor QMS 3.16
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 154cm³
• Power handling P 70W
• Program power Pmax 140W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 2.63mH
• VC Diameter 35mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 12.6N/A
• Motor constant Bl/√RE 4.92N/√W
• Weight 0.567kg
• Material Ferrite

Diaphragm

• Effective diameter 209mm
• Effective area SD 343cm²
• Moving mass MMS 67.5g
• Moving mass (without air load) MMD 62.9g
• Material Treated Paper

Suspensions

• Stiffness KMS 1.64N/mm
• Compliance CMS 610µm/N
• Equivalent volume to the compliance VAS 104L
• Mechanical resistance RMS 3.34N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 256mm
• Overall diameter 256mm
• Baffle cutout diameter 234mm
• Overall depth 113mm
• Volume occupied by the driver (estimated) 1.4L
• Frame material Steel