Oberton 6M150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 200 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 115Hz
• Mechanical quality factor QMS 5.46
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.42

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 6.2Ω
• Inductance (1kHz) LE 0.438mH
• VC Diameter 44mm
• Winding height HVC 8mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.2T
• Force factor Bl 10N/A
• Motor constant Bl/√RE 4.02N/√W
• Air gap height HAG 7mm
• Material Ferrite

Diaphragm

• Effective diameter 133mm
• Effective area SD 139cm²
• Moving mass MMS 10.2g
• Moving mass (without air load) MMD 8.9g
• Material Paper

Suspensions

• Stiffness KMS 5.35N/mm
• Compliance CMS 187µm/N
• Equivalent volume to the compliance VAS 5.35L
• Mechanical resistance RMS 1.35N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 90mm
• Volume occupied by the driver (estimated) 0.8L
• Net weight 2.5kg
• Frame material Die cast aluminium