Dayton Audio Odeum Apollo 8N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95dB
• Frequency response 75 - 5800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 94Hz
• Mechanical quality factor QMS 4.43
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 3.9mm
• Air volume displaced at xmax VD 79cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.17mH
• VC Diameter 50.8mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 14.4N/A
• Motor constant Bl/√RE 5.88N/√W
• Material Neodymium

Diaphragm

• Effective diameter 160mm
• Effective area SD 201cm²
• Moving mass MMS 20.9g
• Moving mass (without air load) MMD 18.7g
• Material Coated Paper

Suspensions

• Stiffness KMS 7.3N/mm
• Compliance CMS 137µm/N
• Equivalent volume to the compliance VAS 8.8L
• Mechanical resistance RMS 2.79N·s/m
• Surround material Paper

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 210mm
• Baffle cutout diameter 182mm
• Overall depth 87mm
• Volume occupied by the driver (estimated) 0.73L
• Frame material Steel