Focal Sub 12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 24Hz
• Mechanical quality factor QMS 5.15
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.48

Large signal parameters

• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz, estimated) LE 1.87mH
• VC Diameter 50mm

Magnet

• Force factor Bl 12N/A
• Motor constant Bl/√RE 6.93N/√W
• Diameter 145mm

Diaphragm

• Effective diameter 245mm
• Effective area SD 471cm²
• Moving mass MMS 150g
• Moving mass (without air load) MMD 142g
• Material Polypropylene

Suspensions

• Stiffness KMS 3.45N/mm
• Compliance CMS 290µm/N
• Equivalent volume to the compliance VAS 90L
• Mechanical resistance RMS 4.4N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 12″
• 324mm
• Overall diameter 324mm
• Baffle cutout diameter 281mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 2.4L
• Net weight 5.5kg