Dayton Audio GF180-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.6dB
• Frequency response 50 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 53Hz
• Mechanical quality factor QMS 3.07
• Electrical quality factor QES 0.60
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 52cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 8.0Ω
• Inductance (1kHz) LE 1.9mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 7.9N/A
• Motor constant Bl/√RE 2.79N/√W
• Material Ferrite

Diaphragm

• Effective diameter 129mm
• Effective area SD 130cm²
• Moving mass MMS 13.9g
• Moving mass (without air load) MMD 12.7g
• Material Fiberglass

Suspensions

• Stiffness KMS 1.54N/mm
• Compliance CMS 650µm/N
• Equivalent volume to the compliance VAS 15.5L
• Mechanical resistance RMS 1.51N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 6.5″
• 180mm
• Overall diameter 178mm
• Baffle cutout diameter 144mm
• Overall depth 81mm
• Volume occupied by the driver (estimated) 0.53L
• Frame material Steel