Morel Elite EM 428

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 68Hz
• Mechanical quality factor QMS 3.03
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 17cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.36mH
• VC Diameter 54mm
• Winding height HVC 12mm
• Winding material Hexatech™ Aluminum
• Former material Aluminum

Magnet

• Flux density B 0.88T
• Force factor Bl 5.4N/A
• Motor constant Bl/√RE 2.32N/√W
• Air gap height HAG 6mm
• Material Neodymium vented

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 6.55g
• Moving mass (without air load) MMD 6.2g
• Material Damped polymer composite

Suspensions

• Stiffness KMS 1.14N/mm
• Compliance CMS 880µm/N
• Equivalent volume to the compliance VAS 3.5L
• Mechanical resistance RMS 0.86N·s/m

Dimensions

• Nominal diameter 4″
• 119mm
• Overall diameter 119mm
• Baffle cutout diameter 94mm
• Overall depth 56mm
• Flange thickness 5mm
• Mounting depth 51mm
• Volume occupied by the driver (estimated) 0.16L
• Net weight 0.518kg