Focal K2 POWER ES 165 KX2E

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.2dB
• Frequency response 55 - 22000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 5.20
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.55

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 68cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 1.8Ω
• Inductance (1kHz, estimated) LE 0.25mH
• VC Diameter 40mm
• Winding material Copper Clad Aluminium
• Former material Kapton

Magnet

• Force factor Bl 4N/A
• Motor constant Bl/√RE 2.98N/√W
• Diameter 100mm
• Height 22mm

Diaphragm

• Effective diameter 128mm
• Effective area SD 129cm²
• Moving mass MMS 15.3g
• Moving mass (without air load) MMD 14.2g
• Material K2 Sandwich

Suspensions

• Stiffness KMS 1.85N/mm
• Compliance CMS 540µm/N
• Equivalent volume to the compliance VAS 14L
• Mechanical resistance RMS 1.02N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 165mm
• Baffle cutout diameter 142mm
• Mounting depth 76mm
• Volume occupied by the driver (estimated) 0.69L
• Net weight 1.7kg