Oberton 8NM200

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.4dB
• Frequency response 100 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 83.9Hz
• Mechanical quality factor QMS 11.30
• Electrical quality factor QES 0.21
• Total quality factor QTS 0.20

Large signal parameters

• Maximum linear excursion xmax 2.8mm
• Air volume displaced at xmax VD 56cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.37mH
• VC Diameter 51mm
• Winding height HVC 10mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.55T
• Force factor Bl 14.9N/A
• Motor constant Bl/√RE 6.49N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 160mm
• Effective area SD 202cm²
• Moving mass MMS 16.6g
• Moving mass (without air load) MMD 14.3g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 4.61N/mm
• Compliance CMS 217µm/N
• Equivalent volume to the compliance VAS 12.1L
• Mechanical resistance RMS 0.77N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 82mm
• Volume occupied by the driver (estimated) 0.74L
• Net weight 2.0kg
• Frame material Die cast aluminium