Fountek FW322 4ohm

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90dB
• Frequency response 40 - 900Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41.8Hz
• Mechanical quality factor QMS 2.21
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 10mm
• Air volume displaced at xmax VD 515cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz, estimated) LE 1.96mH
• VC Diameter 75mm
• Winding height HVC 28mm
• Winding material Copper

Magnet

• Flux density B 1T
• Force factor Bl 17N/A
• Motor constant Bl/√RE 9.22N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 134g
• Moving mass (without air load) MMD 125g

Suspensions

• Stiffness KMS 9.26N/mm
• Compliance CMS 108µm/N
• Equivalent volume to the compliance VAS 40.6L
• Mechanical resistance RMS 15.9N·s/m

Dimensions

• Nominal diameter 12″
• 322mm
• Overall diameter 317mm
• Overall depth 152mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 7.4kg