Dayton Audio Designer DS90-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.1dB
• Frequency response 80 - 13000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 81.4Hz
• Mechanical quality factor QMS 2.19
• Electrical quality factor QES 0.53
• Total quality factor QTS 0.43

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 6.3Ω
• Inductance (1kHz) LE 0.56mH
• VC Diameter 20.4mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 4.76N/A
• Motor constant Bl/√RE 1.9N/√W
• Weight 0.227kg
• Material Ferrite

Diaphragm

• Effective diameter 63mm
• Effective area SD 31.2cm²
• Moving mass MMS 3.8g
• Moving mass (without air load) MMD 3.7g
• Material Coated Paper

Suspensions

• Stiffness KMS 0.98N/mm
• Compliance CMS 1020µm/N
• Equivalent volume to the compliance VAS 1.31L
• Mechanical resistance RMS 0.89N·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