ETON 4-512/C8/25RP

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.9dB
• Frequency response 78 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 78Hz
• Mechanical quality factor QMS 6.65
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 11cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.35mH
• VC Diameter 25mm
• Winding material Kapton

Magnet

• Force factor Bl 6N/A
• Motor constant Bl/√RE 2.49N/√W
• Diameter 90mm

Diaphragm

• Effective diameter 84mm
• Effective area SD 55cm²
• Moving mass MMS 4.5g
• Moving mass (without air load) MMD 4.2g

Suspensions

• Stiffness KMS 1.16N/mm
• Compliance CMS 860µm/N
• Equivalent volume to the compliance VAS 3.7L
• Mechanical resistance RMS 0.33N·s/m

Dimensions

• Nominal diameter 4″
• 122mm
• Overall diameter 122mm
• Baffle cutout diameter 96mm
• Overall depth 66mm
• Flange thickness 6mm
• Mounting depth 60mm
• Volume occupied by the driver (estimated) 0.32L
• Net weight 1.23kg