Dayton Audio PC68-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.1dB
• Frequency response 110 - 17000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 109Hz
• Mechanical quality factor QMS 2.27
• Electrical quality factor QES 0.88
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 4.2cm³
• Power handling P 20W
• Program power Pmax 40W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.8Ω
• Inductance (1kHz) LE 0.47mH
• VC Diameter 19mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 3.3N/A
• Motor constant Bl/√RE 1.27N/√W
• Material Ferrite

Diaphragm

• Effective diameter 52mm
• Effective area SD 21.2cm²
• Moving mass MMS 2g
• Moving mass (without air load) MMD 1.9g
• Material Poly Composite

Suspensions

• Stiffness KMS 0.952N/mm
• Compliance CMS 1050µm/N
• Equivalent volume to the compliance VAS 1.3L
• Mechanical resistance RMS 0.6N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 2.5″
• 68mm
• Overall diameter 68mm
• Baffle cutout diameter 64mm
• Overall depth 37mm
• Frame material Stamped Steel