Dayton Audio Reference RS150P-4A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB
• Frequency response 45 - 10000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43.7Hz
• Mechanical quality factor QMS 1.85
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 4.4mm
• Air volume displaced at xmax VD 37cm³
• Power handling P 40W
• Program power Pmax 65W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.39mH
• VC Diameter 25mm

Magnet

• Force factor Bl 4.4N/A
• Motor constant Bl/√RE 2.35N/√W
• Material Ferrite

Diaphragm

• Effective diameter 104mm
• Effective area SD 85cm²
• Moving mass MMS 8.6g
• Moving mass (without air load) MMD 8g
• Material Paper / Kevlar

Suspensions

• Stiffness KMS 0.649N/mm
• Compliance CMS 1540µm/N
• Equivalent volume to the compliance VAS 15.7L
• Mechanical resistance RMS 1.28N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 6″
• 150mm
• Overall diameter 150mm
• Baffle cutout diameter 122mm
• Overall depth 74mm
• Volume occupied by the driver (estimated) 0.38L
• Frame material Cast Aluminium