Dayton Audio CE78PF-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.5dB
• Frequency response 200 - 18000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 100Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 1.34
• Total quality factor QTS 0.99

Large signal parameters

• Maximum linear excursion xmax 1.4mm
• Air volume displaced at xmax VD 4.2cm³
• Power handling P 10W
• Program power Pmax 20W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 0.17mH
• VC Diameter 20mm

Magnet

• Force factor Bl 2.22N/A
• Motor constant Bl/√RE 1.15N/√W

Diaphragm

• Effective diameter 62mm
• Effective area SD 30.2cm²
• Moving mass MMS 2.8g
• Moving mass (without air load) MMD 2.7g

Suspensions

• Stiffness KMS 1.13N/mm
• Compliance CMS 887µm/N
• Equivalent volume to the compliance VAS 1.14L
• Mechanical resistance RMS 0.45N·s/m

Dimensions

• Nominal diameter 3″
• 78mm
• Overall diameter 78mm
• Baffle cutout diameter 70mm
• Overall depth 42mm
• Volume occupied by the driver (estimated) 0.11L