Dayton Audio Odeum Apollo 15LF

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
• Frequency response 25 - 1200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25.5Hz
• Mechanical quality factor QMS 6.70
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 9.3mm
• Air volume displaced at xmax VD 775cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 1.74mH
• VC Diameter 76.2mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 21.1N/A
• Motor constant Bl/√RE 8.34N/√W
• Material Ferrite

Diaphragm

• Effective diameter 327mm
• Effective area SD 837cm²
• Moving mass MMS 117g
• Moving mass (without air load) MMD 99.8g
• Material Treated Paper

Suspensions

• Stiffness KMS 3.03N/mm
• Compliance CMS 330µm/N
• Equivalent volume to the compliance VAS 331L
• Mechanical resistance RMS 2.8N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 15″
• 391mm
• Overall diameter 391mm
• Baffle cutout diameter 356mm
• Overall depth 178mm
• Volume occupied by the driver (estimated) 4.4L
• Frame material Cast Aluminium