Oberton 6NCX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.3dB
• Frequency response 80 - 18000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 91.5Hz
• Mechanical quality factor QMS 4.94
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 5.8mm
• Air volume displaced at xmax VD 75cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.52mH
• VC Diameter 44mm
• Winding height HVC 15mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 0.97T
• Force factor Bl 10.3N/A
• Motor constant Bl/√RE 4.47N/√W
• Air gap height HAG 7mm
• Material Neodymium

Diaphragm

• Effective diameter 129mm
• Effective area SD 131cm²
• Moving mass MMS 16.6g
• Moving mass (without air load) MMD 15.4g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 5.56N/mm
• Compliance CMS 180µm/N
• Equivalent volume to the compliance VAS 4.35L
• Mechanical resistance RMS 1.93N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 98mm
• Volume occupied by the driver (estimated) 0.57L
• Net weight 1.35kg
• Frame material Die Cast Aluminium