Oberton 8MB201

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93dB
• Frequency response 65 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 67.7Hz
• Mechanical quality factor QMS 6.24
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 140cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.8mH
• VC Diameter 51mm
• Winding height HVC 17.5mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.35T
• Force factor Bl 12.5N/A
• Motor constant Bl/√RE 5.21N/√W
• Air gap height HAG 7mm
• Material Ferrite

Diaphragm

• Effective diameter 160mm
• Effective area SD 200cm²
• Moving mass MMS 21g
• Moving mass (without air load) MMD 18.7g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 3.79N/mm
• Compliance CMS 264µm/N
• Equivalent volume to the compliance VAS 14.7L
• Mechanical resistance RMS 1.43N·s/m

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 90mm
• Volume occupied by the driver (estimated) 1.1L
• Net weight 3.22kg
• Frame material Die cast aluminium