Oberton 15MB35

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.5dB
• Frequency response 45 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47.7Hz
• Mechanical quality factor QMS 8.38
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 6.8mm
• Air volume displaced at xmax VD 560cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.637mH
• VC Diameter 88mm
• Winding height HVC 19mm
• Winding material Aluminium
• Former material Glass fiber

Magnet

• Flux density B 1.15T
• Force factor Bl 20.1N/A
• Motor constant Bl/√RE 8.92N/√W
• Air gap height HAG 11mm
• Material Ferrite

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 93g
• Moving mass (without air load) MMD 76.1g
• Material Paper with Kevlar + glass fibers

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 115L
• Mechanical resistance RMS 3.32N·s/m

Dimensions

• Nominal diameter 15″
• 385mm
• Overall diameter 388mm
• Baffle cutout diameter 355mm
• Overall depth 174mm
• Volume occupied by the driver (estimated) 4.6L
• Net weight 9.2kg
• Frame material Die cast aluminium