Fostex W300AII

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.5dB
• Frequency response 25 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 9.17
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 350cm³
• Power handling P 50W
• Program power Pmax 150W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.0Ω
• Inductance (1kHz) LE 0.1mH
• VC Diameter 80mm

Magnet

• Force factor Bl 18.8N/A
• Motor constant Bl/√RE 7.09N/√W
• Weight 1.1kg
• Material Alnico

Diaphragm

• Effective diameter 262mm
• Effective area SD 539cm²
• Moving mass MMS 92.7g
• Moving mass (without air load) MMD 83.8g

Suspensions

• Stiffness KMS 17.9N/mm
• Compliance CMS 56µm/N
• Equivalent volume to the compliance VAS 227L
• Mechanical resistance RMS 1.59N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 317mm
• Baffle cutout diameter 280mm
• Overall depth 180mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 6.3kg