Dayton Audio Point Source PS65LP-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.3dB
• Frequency response 60 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 67.3Hz
• Mechanical quality factor QMS 3.85
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 49cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.39mH
• VC Diameter 25.4mm
• Winding material Copper Clad Aluminium
• Former material Kapton®

Magnet

• Force factor Bl 6N/A
• Motor constant Bl/√RE 3.35N/√W
• Material Neodymium

Diaphragm

• Effective diameter 125mm
• Effective area SD 123cm²
• Moving mass MMS 6.8g
• Moving mass (without air load) MMD 5.8g

Suspensions

• Stiffness KMS 1.22N/mm
• Compliance CMS 820µm/N
• Equivalent volume to the compliance VAS 17.3L
• Mechanical resistance RMS 0.75N·s/m
• Surround material Textile

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 165mm
• Baffle cutout diameter 144mm
• Overall depth 63mm
• Volume occupied by the driver (estimated) 0.34L
• Frame material Stamped Steel