Celestion BN12-300S (4)

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.2dB
• Frequency response 50 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51.4Hz
• Mechanical quality factor QMS 3.64
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 133cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.7Ω
• Inductance (1kHz) LE 0.26mH
• VC Diameter 63.5mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 10.4N/A
• Motor constant Bl/√RE 6.29N/√W
• Air gap height HAG 8mm
• Height 37mm
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 48.3g
• Moving mass (without air load) MMD 39.7g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 5.05N/mm
• Compliance CMS 198µm/N
• Equivalent volume to the compliance VAS 80.6L
• Mechanical resistance RMS 4.3N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 309mm
• Baffle cutout diameter 283mm
• Overall depth 132mm
• Volume occupied by the driver (estimated) 1.2L
• Net weight 2.0kg