Dayton Audio PN470-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
• Frequency response 30 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 31.6Hz
• Mechanical quality factor QMS 9.29
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 791cm³
• Power handling P 800W
• Program power Pmax 1600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 2.2mH
• VC Diameter 101.6mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 25.8N/A
• Motor constant Bl/√RE 10.9N/√W
• Material Neodymium

Diaphragm

• Effective diameter 394mm
• Effective area SD 1217cm²
• Moving mass MMS 212g
• Moving mass (without air load) MMD 182g
• Material Paper / Glass Fiber

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 252L
• Mechanical resistance RMS 4.52N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 18″
• 465mm
• Overall diameter 465mm
• Baffle cutout diameter 424mm
• Overall depth 206mm
• Volume occupied by the driver (estimated) 6.7L
• Frame material Cast Aluminium