Fountek FW168

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB
• Frequency response 40 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 3.25
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 4.6mm
• Air volume displaced at xmax VD 55cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.2Ω
• Inductance (1kHz, estimated) LE 0.95mH
• VC Diameter 36mm
• Winding height HVC 15mm
• Winding material Copper
• Former material Black Aluminum

Magnet

• Flux density B 1T
• Force factor Bl 8.2N/A
• Motor constant Bl/√RE 3.06N/√W
• Air gap height HAG 5.8mm
• Material Ferrite

Diaphragm

• Effective diameter 123mm
• Effective area SD 119cm²
• Moving mass MMS 14.7g
• Moving mass (without air load) MMD 13.7g

Suspensions

• Stiffness KMS 1.22N/mm
• Compliance CMS 821µm/N
• Equivalent volume to the compliance VAS 16.5L
• Mechanical resistance RMS 1.28N·s/m

Dimensions

• Nominal diameter 6.5″
• 168mm
• Overall diameter 168mm
• Overall depth 80mm
• Volume occupied by the driver (estimated) 0.56L
• Net weight 1.76kg