Oberton 10M250

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.2dB
• Frequency response 70 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 76.7Hz
• Mechanical quality factor QMS 14.62
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 2.8mm
• Air volume displaced at xmax VD 87cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 64mm
• Winding height HVC 10mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.4T
• Force factor Bl 16.6N/A
• Motor constant Bl/√RE 6.73N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 201mm
• Effective area SD 317cm²
• Moving mass MMS 26.8g
• Moving mass (without air load) MMD 22.5g
• Material Paper

Suspensions

• Stiffness KMS 6.21N/mm
• Compliance CMS 161µm/N
• Equivalent volume to the compliance VAS 23.1L
• Mechanical resistance RMS 0.88N·s/m

Dimensions

• Nominal diameter 10″
• 262mm
• Overall diameter 263mm
• Baffle cutout diameter 225mm
• Overall depth 123mm
• Volume occupied by the driver (estimated) 2.3L
• Net weight 6.6kg
• Frame material Die cast aluminium