Dayton Audio DMA58-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.8dB
• Frequency response 160 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 166Hz
• Mechanical quality factor QMS 2.40
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 2.9cm³
• Power handling P 15W
• Program power Pmax 30W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 25.4mm

Magnet

• Force factor Bl 3.7N/A
• Motor constant Bl/√RE 1.95N/√W

Diaphragm

• Effective diameter 43mm
• Effective area SD 14.5cm²
• Moving mass MMS 2.1g
• Moving mass (without air load) MMD 2.1g

Suspensions

• Stiffness KMS 2.22N/mm
• Compliance CMS 450µm/N
• Equivalent volume to the compliance VAS 0.142L
• Mechanical resistance RMS 0.91N·s/m

Dimensions

• Nominal diameter 2″
• 51mm