Focal K2 POWER SUB 25 KXS

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.4dB
• Frequency response 25 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.97
• Total quality factor QTS 0.80

Large signal parameters

• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 2.25mH
• VC Diameter 45mm

Magnet

• Force factor Bl 11.5N/A
• Motor constant Bl/√RE 6.43N/√W

Diaphragm

• Effective diameter 204mm
• Effective area SD 327cm²
• Moving mass MMS 180g
• Moving mass (without air load) MMD 176g
• Material K2 Sandwich

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 18L
• Mechanical resistance RMS 7.92N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 10″
• 268mm
• Overall diameter 268mm
• Baffle cutout diameter 235mm
• Mounting depth 95mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.7kg