Dayton Audio HTS545HE-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.5dB
• Frequency response 18 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 26.3Hz
• Mechanical quality factor QMS 7.90
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 21mm
• Air volume displaced at xmax VD 3221cm³
• Power handling P 2000W
• Program power Pmax 4000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.8Ω
• Inductance (1kHz) LE 8.5mH
• VC Diameter 127mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 38.2N/A
• Motor constant Bl/√RE 19.6N/√W
• Material Ferrite

Diaphragm

• Effective diameter 442mm
• Effective area SD 1534cm²
• Moving mass MMS 676g
• Moving mass (without air load) MMD 632g
• Material Treated Paper

Suspensions

• Stiffness KMS 20N/mm
• Compliance CMS 50µm/N
• Equivalent volume to the compliance VAS 179L
• Mechanical resistance RMS 14.1N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 21″
• 545mm
• Overall diameter 545mm
• Baffle cutout diameter 495mm
• Overall depth 259mm
• Volume occupied by the driver (estimated) 11L
• Frame material Cast Aluminium