Fountek FW168K

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.9dB
• Frequency response 70 - 4500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 48.6Hz
• Mechanical quality factor QMS 2.32
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 62cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.8Ω
• Inductance (1kHz, estimated) LE 0.94mH
• VC Diameter 35.5mm
• Winding height HVC 15mm
• Winding material Copper
• Former material Black Aluminum

Magnet

• Flux density B 1T
• Force factor Bl 7.9N/A
• Motor constant Bl/√RE 3.03N/√W
• Air gap height HAG 5mm
• Material Ferrite

Diaphragm

• Effective diameter 126mm
• Effective area SD 125cm²
• Moving mass MMS 15.7g
• Moving mass (without air load) MMD 14.5g

Suspensions

• Stiffness KMS 1.46N/mm
• Compliance CMS 684µm/N
• Equivalent volume to the compliance VAS 15.1L
• Mechanical resistance RMS 2.06N·s/m

Dimensions

• Nominal diameter 6.5″
• 168mm
• Overall diameter 182mm
• Overall depth 87mm
• Volume occupied by the driver (estimated) 0.55L
• Net weight 1.45kg