Oberton 15NMB600

• Sensitivity (1W, 1m, infinite baffle) SPL1W 99.6dB
• Frequency response 45 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43.3Hz
• Mechanical quality factor QMS 7.22
• Electrical quality factor QES 0.18
• Total quality factor QTS 0.17

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 436cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.01mH
• VC Diameter 100mm
• Winding height HVC 15mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.45T
• Force factor Bl 27.4N/A
• Motor constant Bl/√RE 11.7N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 89.7g
• Moving mass (without air load) MMD 72.8g
• Material Paper with Kevlar

Suspensions

• Stiffness KMS 6.62N/mm
• Compliance CMS 151µm/N
• Equivalent volume to the compliance VAS 145L
• Mechanical resistance RMS 3.37N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 355mm
• Overall depth 198mm
• Volume occupied by the driver (estimated) 4.5L
• Net weight 7.9kg
• Frame material Die Cast Aluminium