Dayton Audio MB620-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.1dB
• Frequency response 100 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 104Hz
• Mechanical quality factor QMS 4.29
• Electrical quality factor QES 0.69
• Total quality factor QTS 0.59

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 27cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 0.93mH
• VC Diameter 50.8mm
• Winding material CCA

Magnet

• Force factor Bl 6.68N/A
• Motor constant Bl/√RE 2.86N/√W
• Weight 0.936kg
• Material Ferrite

Diaphragm

• Effective diameter 130mm
• Effective area SD 133cm²
• Moving mass MMS 8.59g
• Moving mass (without air load) MMD 7.4g
• Material Paper

Suspensions

• Stiffness KMS 3.65N/mm
• Compliance CMS 274µm/N
• Equivalent volume to the compliance VAS 6.77L
• Mechanical resistance RMS 1.31N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 6.5″
• 167mm
• Overall diameter 167mm
• Baffle cutout diameter 147mm
• Overall depth 80mm
• Volume occupied by the driver (estimated) 0.48L
• Frame material Steel