Dayton Audio DA270-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 25 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 27.8Hz
• Mechanical quality factor QMS 1.95
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 6.1mm
• Air volume displaced at xmax VD 211cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 36mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 4.02N/√W
• Weight 1.503kg
• Material Ferrite

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 51.3g
• Moving mass (without air load) MMD 46.5g
• Material Aluminum

Suspensions

• Stiffness KMS 1.56N/mm
• Compliance CMS 640µm/N
• Equivalent volume to the compliance VAS 109L
• Mechanical resistance RMS 4.6N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 270mm
• Overall diameter 270mm
• Baffle cutout diameter 227mm
• Overall depth 115mm
• Volume occupied by the driver (estimated) 1.5L
• Frame material Steel