Oberton 15B500

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96dB
• Frequency response 38 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38.2Hz
• Mechanical quality factor QMS 12.06
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 7.3mm
• Air volume displaced at xmax VD 602cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.25mH
• VC Diameter 77mm
• Winding height HVC 20mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.2T
• Force factor Bl 22.9N/A
• Motor constant Bl/√RE 10N/√W
• Air gap height HAG 11mm
• Material Ferrite

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 114g
• Moving mass (without air load) MMD 97.5g
• Material Paper

Suspensions

• Stiffness KMS 6.58N/mm
• Compliance CMS 152µm/N
• Equivalent volume to the compliance VAS 146L
• Mechanical resistance RMS 2.28N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 355mm
• Overall depth 172mm
• Volume occupied by the driver (estimated) 4.1L
• Net weight 7.8kg
• Frame material Die cast aluminium