Oberton 15NB451

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.7dB
• Frequency response 48 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39.6Hz
• Mechanical quality factor QMS 10.54
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 581cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.6mH
• VC Diameter 77mm
• Winding height HVC 18mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.45T
• Force factor Bl 22.9N/A
• Motor constant Bl/√RE 9.75N/√W
• Air gap height HAG 9mm
• Material Neodymium

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 101g
• Moving mass (without air load) MMD 83.7g
• Material Paper with Glass fiber

Suspensions

• Stiffness KMS 6.25N/mm
• Compliance CMS 160µm/N
• Equivalent volume to the compliance VAS 145L
• Mechanical resistance RMS 2.37N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 355mm
• Overall depth 198mm
• Volume occupied by the driver (estimated) 3.3L
• Net weight 4.9kg
• Frame material Die Cast Aluminium