Oberton 18XB700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36.1Hz
• Mechanical quality factor QMS 9.26
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.30

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 1.83mH
• VC Diameter 100mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 0.97T
• Force factor Bl 26.1N/A
• Motor constant Bl/√RE 11.5N/√W
• Air gap height HAG 14mm
• Material Ferrite

Diaphragm

• Effective diameter 376mm
• Effective area SD 1110cm²
• Moving mass MMS 183g
• Moving mass (without air load) MMD 156g
• Material Kevlar paper

Suspensions

• Stiffness KMS 9.4N/mm
• Compliance CMS 106µm/N
• Equivalent volume to the compliance VAS 183L
• Mechanical resistance RMS 4.47N·s/m

Dimensions

• Nominal diameter 18″
• 461mm
• Overall diameter 461mm
• Baffle cutout diameter 417mm
• Overall depth 203mm
• Volume occupied by the driver (estimated) 6.9L
• Net weight 12.55kg
• Frame material Die cast aluminium