Oberton 8NB201

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB
• Frequency response 65 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 70.6Hz
• Mechanical quality factor QMS 5.97
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 106cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.96mH
• VC Diameter 51mm
• Winding height HVC 14mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.25T
• Force factor Bl 14.4N/A
• Motor constant Bl/√RE 6.28N/√W
• Air gap height HAG 7mm
• Material Neodymium

Diaphragm

• Effective diameter 160mm
• Effective area SD 202cm²
• Moving mass MMS 22.7g
• Moving mass (without air load) MMD 20.4g
• Material Paper with glassfiber

Suspensions

• Stiffness KMS 4.46N/mm
• Compliance CMS 224µm/N
• Equivalent volume to the compliance VAS 12.5L
• Mechanical resistance RMS 1.68N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 89mm
• Volume occupied by the driver (estimated) 0.88L
• Net weight 2.38kg
• Frame material Die cast aluminium