Oberton 18NXB700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 36 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36.2Hz
• Mechanical quality factor QMS 7.94
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 999cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.97mH
• VC Diameter 100mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1T
• Force factor Bl 27.8N/A
• Motor constant Bl/√RE 12.2N/√W
• Air gap height HAG 14mm
• Material Neodymium

Diaphragm

• Effective diameter 376mm
• Effective area SD 1110cm²
• Moving mass MMS 214g
• Moving mass (without air load) MMD 187g
• Material Kevlar paper

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90µm/N
• Equivalent volume to the compliance VAS 155L
• Mechanical resistance RMS 6.13N·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