Dayton Audio TCP115-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.8dB
• Frequency response 55 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 53.8Hz
• Mechanical quality factor QMS 3.14
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 20cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.97mH
• VC Diameter 25.4mm
• Winding material Copper Clad Aluminium
• Former material Aluminum

Magnet

• Force factor Bl 5.2N/A
• Motor constant Bl/√RE 2.91N/√W
• Material Ferrite

Diaphragm

• Effective diameter 80mm
• Effective area SD 50.3cm²
• Moving mass MMS 9.9g
• Moving mass (without air load) MMD 9.6g
• Material Treated Paper

Suspensions

• Stiffness KMS 1.14N/mm
• Compliance CMS 880µm/N
• Equivalent volume to the compliance VAS 3.1L
• Mechanical resistance RMS 1.07N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 4″
• 116mm
• Overall diameter 116mm
• Baffle cutout diameter 93mm
• Overall depth 65mm
• Volume occupied by the driver (estimated) 0.22L
• Frame material Steel