Oberton 8NCX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.5dB
• Frequency response 70 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 77.2Hz
• Mechanical quality factor QMS 4.66
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 106cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.648mH
• VC Diameter 51mm
• Winding height HVC 15mm
• Winding material Aluminium
• Former material Glass fiber

Magnet

• Flux density B 0.9T
• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 4.19N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 160mm
• Effective area SD 202cm²
• Moving mass MMS 15.9g
• Moving mass (without air load) MMD 13.7g
• Material Paper with carbon fibers

Suspensions

• Stiffness KMS 3.75N/mm
• Compliance CMS 267µm/N
• Equivalent volume to the compliance VAS 14.9L
• Mechanical resistance RMS 1.66N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 115mm
• Volume occupied by the driver (estimated) 1.1L
• Net weight 2.6kg
• Frame material Die Cast Aluminium