Focal K2 POWER ES 100 KE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
• Frequency response 110 - 22000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 140Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 1.10
• Total quality factor QTS 0.90

Large signal parameters

• Maximum linear excursion xmax 2.3mm
• Air volume displaced at xmax VD 12cm³
• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.8Ω
• Inductance (1kHz, estimated) LE 0.17mH
• VC Diameter 20mm

Magnet

• Force factor Bl 3.3N/A
• Motor constant Bl/√RE 1.97N/√W

Diaphragm

• Effective diameter 83mm
• Effective area SD 54cm²
• Moving mass MMS 4.7g
• Moving mass (without air load) MMD 4.4g
• Material K2 Sandwich

Suspensions

• Stiffness KMS 3.85N/mm
• Compliance CMS 260µm/N
• Equivalent volume to the compliance VAS 1L
• Mechanical resistance RMS 0.98N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 4″
• 102mm
• Overall diameter 102mm
• Baffle cutout diameter 93mm
• Mounting depth 39mm
• Volume occupied by the driver (estimated) 0.14L
• Net weight 0.215kg