Fi Car Audio FiDay 15

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 29.8Hz
• Mechanical quality factor QMS 5.42
• Electrical quality factor QES 0.41
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 19mm
• Air volume displaced at xmax VD 1539cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 1.9Ω
• Inductance (1kHz, estimated) LE 1.22mH

Magnet

• Force factor Bl 11.6N/A
• Motor constant Bl/√RE 8.43N/√W

Diaphragm

• Effective diameter 321mm
• Effective area SD 810cm²
• Moving mass MMS 157g
• Moving mass (without air load) MMD 141g

Suspensions

• Stiffness KMS 5.4N/mm
• Compliance CMS 185µm/N
• Equivalent volume to the compliance VAS 168L
• Mechanical resistance RMS 5.42N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Volume occupied by the driver (estimated) 4.3L