Oberton 6NB150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.5dB
• Frequency response 60 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 62.3Hz
• Mechanical quality factor QMS 5.22
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 70cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 38mm
• Winding height HVC 14mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.37T
• Force factor Bl 10.8N/A
• Motor constant Bl/√RE 4.56N/√W
• Air gap height HAG 6mm
• Material Neodymium

Diaphragm

• Effective diameter 127mm
• Effective area SD 127cm²
• Moving mass MMS 15.7g
• Moving mass (without air load) MMD 14.6g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 2.41N/mm
• Compliance CMS 415µm/N
• Equivalent volume to the compliance VAS 9.3L
• Mechanical resistance RMS 1.18N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 79mm
• Volume occupied by the driver (estimated) 0.47L
• Net weight 1.25kg
• Frame material Die cast aluminium