Dayton Audio RC180-55

• Sensitivity (1W, 1m, infinite baffle) SPL1W 76.3dB
• Frequency response 50 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 3.31
• Electrical quality factor QES 1.23
• Total quality factor QTS 0.89

Large signal parameters

• Maximum linear excursion xmax 4.7mm
• Air volume displaced at xmax VD 27cm³
• Power handling P 35W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 0.1mH
• Former material Aluminum

Magnet

• Force factor Bl 4.23N/A
• Motor constant Bl/√RE 2.33N/√W
• Material Neodymium

Diaphragm

• Effective diameter 85mm
• Effective area SD 56.4cm²
• Moving mass MMS 20.1g
• Moving mass (without air load) MMD 20.1g
• Material Paper

Suspensions

• Stiffness KMS 2.17N/mm
• Compliance CMS 460µm/N
• Equivalent volume to the compliance VAS 2.04L
• Mechanical resistance RMS 1.98N·s/m
• Surround material Rubber

Dimensions

• Nominal size 2 x 7″
• 55 x 180mm
• Overall size 58 x 176mm
• Baffle cutout diameter 159mm
• Overall depth 77mm
• Volume occupied by the driver (estimated) 0.11L
• Frame material Polymer