Oberton 18NXB1601

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 30 - 250Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34.6Hz
• Mechanical quality factor QMS 5.75
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Air volume displaced at xmax VD 1448cm³
• Power handling P 1600W
• Program power Pmax 3200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 115mm
• Winding height HVC 32mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 30.5N/A
• Motor constant Bl/√RE 13.4N/√W
• Air gap height HAG 14mm
• Material Neodymium

Diaphragm

• Effective diameter 384mm
• Effective area SD 1158cm²
• Moving mass MMS 249g
• Moving mass (without air load) MMD 221g
• Material Paper with carbon fibers

Suspensions

• Stiffness KMS 11.8N/mm
• Compliance CMS 84.9µm/N
• Equivalent volume to the compliance VAS 146L
• Mechanical resistance RMS 9.41N·s/m

Dimensions

• Nominal diameter 18″
• 461mm
• Volume occupied by the driver (estimated) 7L
• Frame material Die cast aluminium