Oberton 6B150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.6dB
• Frequency response 60 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 4.72
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.29

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 0.79mH
• VC Diameter 38mm
• Winding height HVC 14mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.2T
• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 4.27N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 127mm
• Effective area SD 127cm²
• Moving mass MMS 16.4g
• Moving mass (without air load) MMD 15.2g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 1.96N/mm
• Compliance CMS 510µm/N
• Equivalent volume to the compliance VAS 14.6L
• Mechanical resistance RMS 1.2N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 86mm
• Volume occupied by the driver (estimated) 0.76L
• Net weight 2.4kg
• Frame material Die cast aluminium