Oberton 18NSW700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.7dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30.5Hz
• Mechanical quality factor QMS 9.24
• Electrical quality factor QES 0.25
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 13mm
• Air volume displaced at xmax VD 1505cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.96mH
• VC Diameter 77mm
• Winding height HVC 34mm
• Former material Glass fiber

Magnet

• Flux density B 1.35T
• Force factor Bl 26.7N/A
• Motor constant Bl/√RE 10.8N/√W
• Air gap height HAG 16mm
• Material Neodymium

Diaphragm

• Effective diameter 384mm
• Effective area SD 1158cm²
• Moving mass MMS 152g
• Moving mass (without air load) MMD 124g
• Material Paper with Carbone fibers

Suspensions

• Stiffness KMS 5.57N/mm
• Compliance CMS 180µm/N
• Equivalent volume to the compliance VAS 309L
• Mechanical resistance RMS 3.15N·s/m

Dimensions

• Nominal diameter 18″
• 461mm
• Overall diameter 461mm
• Baffle cutout diameter 417mm
• Overall depth 225mm
• Volume occupied by the driver (estimated) 6.5L
• Net weight 10.3kg
• Frame material Die cast aluminium