Focal K2 POWER ES 165 KE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB
• Frequency response 60 - 22000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 64Hz
• Mechanical quality factor QMS 5.70
• Electrical quality factor QES 0.69
• Total quality factor QTS 0.62

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 58cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 0.42mH
• VC Diameter 32mm
• Winding material Copper Clad Aluminium
• Former material Kapton

Magnet

• Force factor Bl 5.2N/A
• Motor constant Bl/√RE 2.91N/√W
• Diameter 90mm
• Height 20mm

Diaphragm

• Effective diameter 128mm
• Effective area SD 129cm²
• Moving mass MMS 14.5g
• Moving mass (without air load) MMD 13.4g
• Material K2 Sandwich

Suspensions

• Stiffness KMS 2.44N/mm
• Compliance CMS 410µm/N
• Equivalent volume to the compliance VAS 10L
• 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 74mm
• Volume occupied by the driver (estimated) 0.54L
• Net weight 1.35kg