Celestion BN15-300X

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.8dB
• Frequency response 42 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 57.8Hz
• Mechanical quality factor QMS 4.49
• Electrical quality factor QES 1.10
• Total quality factor QTS 0.90

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 342cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.39mH
• VC Diameter 63.5mm
• Winding height HVC 16mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 9.13N/A
• Motor constant Bl/√RE 5.11N/√W
• Air gap height HAG 8mm
• Height 37mm
• Material Neodymium

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 84.2g
• Moving mass (without air load) MMD 66.9g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90µm/N
• Equivalent volume to the compliance VAS 98.7L
• Mechanical resistance RMS 6.42N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 351mm
• Overall depth 152mm
• Volume occupied by the driver (estimated) 1.7L
• Net weight 2.3kg