Dayton Audio Reference RSS390HO-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
• Frequency response 21 - 600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 21.5Hz
• Mechanical quality factor QMS 3.69
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 12mm
• Air volume displaced at xmax VD 996cm³
• Power handling P 800W
• Program power Pmax 1600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 1.79mH
• VC Diameter 64mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 19.8N/A
• Motor constant Bl/√RE 11.1N/√W
• Weight 4.252kg
• Material Ferrite

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 319g
• Moving mass (without air load) MMD 302g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 168L
• Mechanical resistance RMS 11.7N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 356mm
• Overall depth 178mm
• Volume occupied by the driver (estimated) 4.3L
• Frame material Cast Aluminium