Oberton 12NCX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98dB
• Frequency response 60 - 16000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 58.2Hz
• Mechanical quality factor QMS 6.18
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 270cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.58mH
• VC Diameter 77mm
• Winding height HVC 15mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.1T
• Force factor Bl 17.2N/A
• Motor constant Bl/√RE 7.2N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 43.9g
• Moving mass (without air load) MMD 35.5g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 62.9L
• Mechanical resistance RMS 2.6N·s/m

Dimensions

• Nominal diameter 12″
• 315mm
• Overall diameter 315mm
• Baffle cutout diameter 280mm
• Overall depth 191mm
• Volume occupied by the driver (estimated) 3L
• Net weight 5.4kg
• Frame material Die Cast Aluminium