Dayton Audio Reference RS150-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.3dB
• Frequency response 48 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45.1Hz
• Mechanical quality factor QMS 1.96
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 4.4mm
• Air volume displaced at xmax VD 37cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 0.34mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 4.1N/A
• Motor constant Bl/√RE 2.33N/√W
• Material Ferrite

Diaphragm

• Effective diameter 104mm
• Effective area SD 85cm²
• Moving mass MMS 7.7g
• Moving mass (without air load) MMD 7.1g
• Material Black Anodized Aluminum

Suspensions

• Stiffness KMS 0.617N/mm
• Compliance CMS 1620µm/N
• Equivalent volume to the compliance VAS 16.4L
• Mechanical resistance RMS 1.11N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 6″
• 150mm
• Overall diameter 150mm
• Baffle cutout diameter 122mm
• Overall depth 70mm
• Volume occupied by the driver (estimated) 0.35L
• Frame material Cast Aluminium