Celestion F12M-150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.2dB
• Frequency response 60 - 12000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 69.4Hz
• Mechanical quality factor QMS 10.45
• Electrical quality factor QES 0.99
• Total quality factor QTS 0.91

Large signal parameters

• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.128mH
• VC Diameter 51mm
• Winding material Round copper

Magnet

• Force factor Bl 10.9N/A
• Motor constant Bl/√RE 4.43N/√W
• Diameter 145mm
• Height 33mm
• Weight 0.9kg
• Material Ceramic

Diaphragm

• Effective diameter 260mm
• Effective area SD 529cm²
• Moving mass MMS 44.8g
• Moving mass (without air load) MMD 36.9g

Suspensions

• Stiffness KMS 8.48N/mm
• Compliance CMS 118µm/N
• Equivalent volume to the compliance VAS 46.9L
• Mechanical resistance RMS 1.87N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 283mm
• Baffle cutout diameter 283mm
• Overall depth 127mm
• Volume occupied by the driver (estimated) 1.7L
• Net weight 3.6kg
• Frame material Pressed steel