Dayton Audio PM220-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.3dB
• Frequency response 43 - 10000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49.1Hz
• Mechanical quality factor QMS 5.08
• Electrical quality factor QES 0.41
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 4.6mm
• Air volume displaced at xmax VD 94cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.8mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 7.21N/A
• Motor constant Bl/√RE 2.83N/√W
• Material Neodymium

Diaphragm

• Effective diameter 162mm
• Effective area SD 205cm²
• Moving mass MMS 10.7g
• Moving mass (without air load) MMD 8.4g
• Material Paper

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 63L
• Mechanical resistance RMS 0.65N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 8″
• 222mm
• Overall diameter 222mm
• Baffle cutout diameter 181mm
• Overall depth 94mm
• Volume occupied by the driver (estimated) 0.87L
• Frame material Cast Aluminium