Dayton Audio DMA90-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.5dB
• Frequency response 90 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 94.2Hz
• Mechanical quality factor QMS 2.65
• Electrical quality factor QES 0.73
• Total quality factor QTS 0.57

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 9.6cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.3Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 25.4mm

Magnet

• Force factor Bl 4.7N/A
• Motor constant Bl/√RE 1.74N/√W

Diaphragm

• Effective diameter 70mm
• Effective area SD 38.5cm²
• Moving mass MMS 3.7g
• Moving mass (without air load) MMD 3.5g

Suspensions

• Stiffness KMS 1.3N/mm
• Compliance CMS 770µm/N
• Equivalent volume to the compliance VAS 1.7L
• Mechanical resistance RMS 0.83N·s/m

Dimensions

• Nominal diameter 3.5″
• 89mm
• Volume occupied by the driver (estimated) 0.1L