Oberton 6NM150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
• Frequency response 200 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 124Hz
• Mechanical quality factor QMS 5.96
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 2.3mm
• Air volume displaced at xmax VD 31cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.3mH
• VC Diameter 44mm
• Winding height HVC 8mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.42T
• Force factor Bl 11.6N/A
• Motor constant Bl/√RE 4.63N/√W
• Air gap height HAG 7mm
• Material Neodymium

Diaphragm

• Effective diameter 133mm
• Effective area SD 139cm²
• Moving mass MMS 11.1g
• Moving mass (without air load) MMD 9.8g
• Material Paper

Suspensions

• Stiffness KMS 6.76N/mm
• Compliance CMS 148µm/N
• Equivalent volume to the compliance VAS 4L
• Mechanical resistance RMS 1.45N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 72mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.05kg
• Frame material Die cast aluminium