Dayton Audio DMA45-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 77.6dB
• Frequency response 150 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 151Hz
• Mechanical quality factor QMS 5.23
• Electrical quality factor QES 0.62
• Total quality factor QTS 0.56

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 1.7cm³
• Power handling P 10W
• Program power Pmax 20W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 0.3mH
• VC Diameter 19mm
• Former material Kapton/Polyimide

Magnet

• Force factor Bl 2.2N/A
• Motor constant Bl/√RE 1.14N/√W

Diaphragm

• Effective diameter 33mm
• Effective area SD 8.6cm²
• Moving mass MMS 1.3g
• Moving mass (without air load) MMD 1.3g

Suspensions

• Stiffness KMS 1.21N/mm
• Compliance CMS 830µm/N
• Equivalent volume to the compliance VAS 0.085L
• Mechanical resistance RMS 0.24N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 1.5″
• 38mm