Focal FLAX EVO Sub P 25 FE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 31Hz
• Mechanical quality factor QMS 4.50
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 14mm
• Air volume displaced at xmax VD 486cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 2.7mH
• VC Diameter 50mm
• Winding height HVC 35mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Flux density B 0.75T
• Force factor Bl 14.8N/A
• Motor constant Bl/√RE 7.69N/√W
• Air gap height HAG 8mm
• Diameter 145mm
• Height 40mm

Diaphragm

• Effective diameter 210mm
• Effective area SD 347cm²
• Moving mass MMS 145g
• Moving mass (without air load) MMD 140g
• Material Flax

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 29L
• Mechanical resistance RMS 6.28N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 260mm
• Baffle cutout diameter 234mm
• Mounting depth 141mm
• Volume occupied by the driver (estimated) 2.4L
• Net weight 5.4kg