Oberton 12B450

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96dB
• Frequency response 50 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 46.3Hz
• Mechanical quality factor QMS 9.56
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 7.8mm
• Air volume displaced at xmax VD 399cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 77mm
• Winding height HVC 21mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.2T
• Force factor Bl 19.3N/A
• Motor constant Bl/√RE 8.58N/√W
• Air gap height HAG 11mm
• Material Ferrite

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 61g
• Moving mass (without air load) MMD 52.5g
• Material Paper

Suspensions

• Stiffness KMS 5.16N/mm
• Compliance CMS 194µm/N
• Equivalent volume to the compliance VAS 71.8L
• Mechanical resistance RMS 1.85N·s/m

Dimensions

• Nominal diameter 12″
• 315mm
• Overall diameter 315mm
• Baffle cutout diameter 280mm
• Overall depth 153mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 7.5kg
• Frame material Die cast aluminium