Oberton 15L400

• Sensitivity (1W, 1m, infinite baffle) SPL1W 100.9dB
• Frequency response 45 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43.3Hz
• Mechanical quality factor QMS 11.56
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 3.3mm
• Air volume displaced at xmax VD 270cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 0.62mH
• VC Diameter 64mm
• Winding height HVC 11mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.35T
• Force factor Bl 16.9N/A
• Motor constant Bl/√RE 7.23N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 56.6g
• Moving mass (without air load) MMD 39.7g
• Material Paper

Suspensions

• Stiffness KMS 4.18N/mm
• Compliance CMS 239µm/N
• Equivalent volume to the compliance VAS 230L
• Mechanical resistance RMS 1.33N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 388mm
• Baffle cutout diameter 352mm
• Overall depth 165mm
• Volume occupied by the driver (estimated) 3.8L
• Net weight 7.25kg
• Frame material Die cast aluminium