Dayton Audio Designer DSA90-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.3dB
• Frequency response 66 - 15000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 66.6Hz
• Mechanical quality factor QMS 2.15
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 7.8cm³
• Power handling P 20W
• Program power Pmax 40W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 0.53mH
• VC Diameter 20.4mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 4.61N/A
• Motor constant Bl/√RE 1.79N/√W
• Weight 0.227kg
• Material Ferrite

Diaphragm

• Effective diameter 63mm
• Effective area SD 31.2cm²
• Moving mass MMS 3.5g
• Moving mass (without air load) MMD 3.4g
• Material Aluminum

Suspensions

• Stiffness KMS 0.61N/mm
• Compliance CMS 1640µm/N
• Equivalent volume to the compliance VAS 2.27L
• Mechanical resistance RMS 0.68N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 3″
• 92mm
• Overall diameter 92mm
• Baffle cutout diameter 70mm
• Overall depth 45mm
• Volume occupied by the driver (estimated) 0.1L
• Frame material Steel