Focal K2 POWER E 25 KX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.1dB
• Frequency response 25 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.58
• Total quality factor QTS 0.52

Large signal parameters

• Maximum linear excursion xmax 22.5mm
• Air volume displaced at xmax VD 736cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 4.21mH
• VC Diameter 65mm
• Winding material Copper Clad Aluminium
• Former material Glass fiber

Magnet

• Force factor (in series) Bl 21.5N/A
• Motor constant Bl/√RE 8.5N/√W
• Diameter 170mm

Diaphragm

• Effective diameter 204mm
• Effective area SD 327cm²
• Moving mass MMS 163g
• Moving mass (without air load) MMD 159g
• Material Kevlar Sandwich

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 20L
• Mechanical resistance RMS 7.78N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 10″
• 269mm
• Overall diameter 269mm
• Baffle cutout diameter 235mm
• Mounting depth 172mm
• Volume occupied by the driver 3L
• Net weight 10.6kg