Oberton 18NXB1200

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35.8Hz
• Mechanical quality factor QMS 9.24
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 11.5mm
• Air volume displaced at xmax VD 1332cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 1.29mH
• VC Diameter 100mm
• Winding height HVC 31mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.05T
• Force factor Bl 29.4N/A
• Motor constant Bl/√RE 12.7N/√W
• Air gap height HAG 14mm
• Material Neodymium

Diaphragm

• Effective diameter 384mm
• Effective area SD 1158cm²
• Moving mass MMS 213g
• Moving mass (without air load) MMD 185g
• Material Carbone paper

Suspensions

• Stiffness KMS 10.8N/mm
• Compliance CMS 92.7µm/N
• Equivalent volume to the compliance VAS 160L
• Mechanical resistance RMS 5.18N·s/m

Dimensions

• Nominal diameter 18″
• 461mm
• Overall diameter 461mm
• Baffle cutout diameter 417mm
• Overall depth 223mm
• Volume occupied by the driver (estimated) 5.9L
• Net weight 8.95kg
• Frame material Die cast aluminium