Focal K2 POWER ES 165 K2S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.9dB
• Frequency response 60 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 8.00
• Electrical quality factor QES 0.62
• Total quality factor QTS 0.58

Large signal parameters

• Power handling P 70W
• Program power Pmax 140W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 2.0Ω
• Inductance (1kHz, estimated) LE 0.29mH
• VC Diameter 32.5mm

Magnet

• Force factor Bl 4.5N/A
• Motor constant Bl/√RE 3.18N/√W

Diaphragm

• Effective diameter 128mm
• Effective area SD 129cm²
• Moving mass MMS 17g
• Moving mass (without air load) MMD 15.9g
• Material K2 Sandwich

Suspensions

• Stiffness KMS 2.33N/mm
• Compliance CMS 430µm/N
• Equivalent volume to the compliance VAS 10L
• Mechanical resistance RMS 0.8N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 165mm
• Baffle cutout diameter 142mm
• Mounting depth 58mm
• Volume occupied by the driver (estimated) 0.27L
• Net weight 0.7kg