Dayton Audio Epique E180HE-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.1dB
• Frequency response 25 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 2.93
• Electrical quality factor QES 0.54
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 14.7mm
• Air volume displaced at xmax VD 200cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.8Ω
• Inductance (1kHz, in series) LE 1.5mH
• VC Diameter 38mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 9.6N/A
• Motor constant Bl/√RE 3.68N/√W
• Material Ferrite

Diaphragm

• Effective diameter 132mm
• Effective area SD 136cm²
• Moving mass MMS 32.5g
• Moving mass (without air load) MMD 31.3g
• Material Carbon Fiber

Suspensions

• Stiffness KMS 1.64N/mm
• Compliance CMS 610µm/N
• Equivalent volume to the compliance VAS 16.1L
• Mechanical resistance RMS 2.44N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 7″
• 180mm
• Overall diameter 182mm
• Baffle cutout diameter 122mm
• Overall depth 116mm
• Volume occupied by the driver (estimated) 0.89L
• Frame material Cast Aluminium