Dayton Audio DMA105-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.5dB
• Frequency response 70 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 72Hz
• Mechanical quality factor QMS 2.64
• Electrical quality factor QES 0.83
• Total quality factor QTS 0.63

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 14cm³
• Power handling P 35W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.5Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 25.4mm

Magnet

• Force factor Bl 4.5N/A
• Motor constant Bl/√RE 1.64N/√W

Diaphragm

• Effective diameter 83mm
• Effective area SD 54.1cm²
• Moving mass MMS 4.9g
• Moving mass (without air load) MMD 4.6g

Suspensions

• Stiffness KMS 1N/mm
• Compliance CMS 1000µm/N
• Equivalent volume to the compliance VAS 4.25L
• Mechanical resistance RMS 0.84N·s/m

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.14L