accuton AS250-8-555

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.6dB
• Frequency response 20 - 600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 23.8Hz
• Mechanical quality factor QMS 3.54
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 358cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.4Ω
• Inductance (1kHz) LE 0.45mH
• VC Diameter 75mm
• Winding material Copper
• Former material Titanium

Magnet

• Force factor Bl 15.3N/A
• Motor constant Bl/√RE 5.62N/√W
• Diameter 210mm
• Height 57mm

Diaphragm

• Effective diameter 225mm
• Effective area SD 398cm²
• Moving mass MMS 76.6g
• Moving mass (without air load) MMD 71.4g
• Material Aluminium-Sandwich

Suspensions

• Stiffness KMS 1.7N/mm
• Compliance CMS 590µm/N
• Equivalent volume to the compliance VAS 131L
• Mechanical resistance RMS 3.23N·s/m

Dimensions

• Nominal diameter 11″
• 250mm
• Baffle cutout diameter 230mm
• Overall depth 159mm
• Flange thickness 18mm
• Mounting depth 141mm
• Volume occupied by the driver (estimated) 3.2L