Dayton Audio Odeum Apollo 6.5N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.7dB
• Frequency response 90 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 103Hz
• Mechanical quality factor QMS 8.02
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 3.8mm
• Air volume displaced at xmax VD 50cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 1.29mH
• VC Diameter 50.8mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 14.9N/A
• Motor constant Bl/√RE 6.05N/√W
• Material Neodymium

Diaphragm

• Effective diameter 130mm
• Effective area SD 133cm²
• Moving mass MMS 16.9g
• Moving mass (without air load) MMD 15.8g
• Material Coated Paper

Suspensions

• Stiffness KMS 7.09N/mm
• Compliance CMS 141µm/N
• Equivalent volume to the compliance VAS 3.5L
• Mechanical resistance RMS 1.36N·s/m
• Surround material Paper

Dimensions

• Nominal diameter 6.5″
• 168mm
• Overall diameter 168mm
• Baffle cutout diameter 146mm
• Overall depth 80mm
• Volume occupied by the driver (estimated) 0.49L
• Frame material Steel