Oberton 12L300

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.3dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 53.8Hz
• Mechanical quality factor QMS 9.98
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 3.3mm
• Air volume displaced at xmax VD 167cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.69mH
• VC Diameter 64mm
• Winding height HVC 11mm
• Winding material Aluminium
• Former material Kapton

Magnet

• Flux density B 1.35T
• Force factor Bl 16.8N/A
• Motor constant Bl/√RE 7.25N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 40.7g
• Moving mass (without air load) MMD 32.3g
• Material Paper

Suspensions

• Stiffness KMS 4.65N/mm
• Compliance CMS 215µm/N
• Equivalent volume to the compliance VAS 79.6L
• Mechanical resistance RMS 1.38N·s/m

Dimensions

• Nominal diameter 12″
• 310mm
• Overall diameter 311mm
• Baffle cutout diameter 280mm
• Overall depth 145mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 6.8kg
• Frame material Die cast aluminium