Fountek FW323 4ohm

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.7dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 2.37
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 17mm
• Air volume displaced at xmax VD 835cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz, estimated) LE 2.48mH
• VC Diameter 75mm
• Winding height HVC 42mm
• Winding material Copper
• Former material Black Aluminum

Magnet

• Flux density B 1T
• Force factor Bl 14.9N/A
• Motor constant Bl/√RE 8.1N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 191g
• Moving mass (without air load) MMD 183g

Suspensions

• Stiffness KMS 6.67N/mm
• Compliance CMS 150µm/N
• Equivalent volume to the compliance VAS 51.4L
• Mechanical resistance RMS 15.2N·s/m

Dimensions

• Nominal diameter 12″
• 323mm
• Overall diameter 317mm
• Overall depth 152mm
• Volume occupied by the driver (estimated) 3.3L
• Net weight 7.75kg