Oberton 15NCX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.4dB
• Frequency response 50 - 16000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43.7Hz
• Mechanical quality factor QMS 10.02
• Electrical quality factor QES 0.38
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 7.8mm
• Air volume displaced at xmax VD 643cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.776mH
• VC Diameter 77mm
• Winding height HVC 20mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.1T
• Force factor Bl 18.6N/A
• Motor constant Bl/√RE 8.21N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 325mm
• Effective area SD 829cm²
• Moving mass MMS 91.9g
• Moving mass (without air load) MMD 75g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 6.94N/mm
• Compliance CMS 144µm/N
• Equivalent volume to the compliance VAS 138L
• Mechanical resistance RMS 2.52N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 355mm
• Overall depth 209mm
• Volume occupied by the driver (estimated) 3.8L
• Net weight 5.65kg
• Frame material Die Cast Aluminium