Fountek FW146

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.9dB
• Frequency response 45 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 3.51
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 3.6mm
• Air volume displaced at xmax VD 28cm³
• Power handling P 35W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz, estimated) LE 0.57mH
• VC Diameter 26mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Black Aluminum

Magnet

• Flux density B 1T
• Force factor Bl 6.07N/A
• Motor constant Bl/√RE 2.48N/√W
• Air gap height HAG 5.8mm
• Material Ferrite

Diaphragm

• Effective diameter 99mm
• Effective area SD 77.6cm²
• Moving mass MMS 8.94g
• Moving mass (without air load) MMD 8.4g

Suspensions

• Stiffness KMS 0.876N/mm
• Compliance CMS 1142µm/N
• Equivalent volume to the compliance VAS 9.8L
• Mechanical resistance RMS 0.8N·s/m

Dimensions

• Nominal diameter 5.5″
• 146mm
• Overall diameter 146mm
• Overall depth 73mm
• Volume occupied by the driver (estimated) 0.39L
• Net weight 1.265kg