Oberton 12CX1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.4dB
• Frequency response 60 - 16000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 57.6Hz
• Mechanical quality factor QMS 4.84
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 4.3mm
• Air volume displaced at xmax VD 219cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.737mH
• VC Diameter 65mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1T
• Force factor Bl 13.9N/A
• Motor constant Bl/√RE 6.1N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 41.3g
• Moving mass (without air load) MMD 32.9g
• Material Paper

Suspensions

• Stiffness KMS 5.41N/mm
• Compliance CMS 185µm/N
• Equivalent volume to the compliance VAS 68.5L
• Mechanical resistance RMS 3.08N·s/m

Dimensions

• Nominal diameter 12″
• 315mm
• Overall diameter 311mm
• Baffle cutout diameter 280mm
• Overall depth 173mm
• Volume occupied by the driver (estimated) 3.5L
• Net weight 7.8kg
• Frame material Die Cast Aluminium