Oberton 18XB1500

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.3dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35.8Hz
• Mechanical quality factor QMS 10.52
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.23

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 1274cm³
• Power handling P 1500W
• Program power Pmax 3000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 1.53mH
• VC Diameter 115mm
• Winding height HVC 29mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 31.6N/A
• Motor constant Bl/√RE 13.7N/√W
• Air gap height HAG 14mm
• Material Ferrite

Diaphragm

• Effective diameter 384mm
• Effective area SD 1158cm²
• Moving mass MMS 212g
• Moving mass (without air load) MMD 184g
• Material Paper with carbon fibers

Suspensions

• Stiffness KMS 8.93N/mm
• Compliance CMS 112µm/N
• Equivalent volume to the compliance VAS 193L
• Mechanical resistance RMS 4.53N·s/m

Dimensions

• Nominal diameter 18″
• 461mm
• Overall diameter 461mm
• Baffle cutout diameter 417mm
• Overall depth 209mm
• Volume occupied by the driver (estimated) 8.4L
• Net weight 16.8kg
• Frame material Die cast aluminium