Oberton 6NMB200

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.1dB
• Frequency response 200 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 91.5Hz
• Mechanical quality factor QMS 10.18
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 63cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 10.6Ω
• Inductance (1kHz) LE 0.18mH
• VC Diameter 51mm
• Winding height HVC 12.5mm
• Winding material Aluminium
• Former material Glass fiber

Magnet

• Flux density B 1.65T
• Force factor Bl 18.8N/A
• Motor constant Bl/√RE 5.78N/√W
• Air gap height HAG 7mm
• Material Neodymium

Diaphragm

• Effective diameter 133mm
• Effective area SD 139cm²
• Moving mass MMS 14.2g
• Moving mass (without air load) MMD 12.9g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 4.67N/mm
• Compliance CMS 214µm/N
• Equivalent volume to the compliance VAS 4.94L
• Mechanical resistance RMS 0.8N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 185mm
• Baffle cutout diameter 145mm
• Overall depth 83mm
• Volume occupied by the driver (estimated) 0.58L
• Net weight 1.64kg
• Frame material Die cast aluminium