Oberton 6NM150

• Sensitivity (1W, 1m, infinite baffle)SPL1W94.7dB
• Frequency response200 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air)fS124Hz
• Mechanical quality factorQMS5.96
• Electrical quality factorQES0.40
• Total quality factorQTS0.38

Large signal parameters

• Maximum linear excursionxmax2.3mm
• Air volume displaced at xmaxVD31cm³
• Power handlingP150W
• Program powerPmax300W

Voice Coil

• Nominal impedanceZ8Ω
• DC resistanceRE6.3Ω
• Inductance (1kHz)LE0.3mH
• VC Diameter44mm
• Winding heightHVC8mm
• Winding materialAluminium
• Former materialKapton

Magnet

• Flux densityB1.42T
• Force factorBl11.6N/A
• Motor constantBl/√RE4.63N/√W
• Air gap heightHAG7mm
• MaterialNeodymium

Diaphragm

• Effective diameter133mm
• Effective areaSD139cm²
• Moving massMMS11.1g
• Moving mass (without air load)MMD9.8g
• MaterialPaper

Suspensions

• StiffnessKMS6.76N/mm
• ComplianceCMS148µm/N
• Equivalent volume to the complianceVAS4L
• Mechanical resistanceRMS1.45N·s/m

Dimensions

• Nominal diameter6.5″
• 170mm
• Overall diameter185mm
• Baffle cutout diameter145mm
• Overall depth72mm
• Volume occupied by the driver (estimated)0.4L
• Net weight1.05kg
• Frame materialDie cast aluminium