accuton AS190-9-251

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.8dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33.4Hz
• Mechanical quality factor QMS 4.75
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 182cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 8.6Ω
• Inductance (1kHz) LE 1.05mH
• VC Diameter 75mm
• Winding material Copper Clad Aluminium
• Former material Titanium

Magnet

• Force factor Bl 13.5N/A
• Motor constant Bl/√RE 4.6N/√W
• Diameter 156mm
• Height 52mm

Diaphragm

• Effective diameter 160mm
• Effective area SD 202cm²
• Moving mass MMS 49.4g
• Moving mass (without air load) MMD 47.4g
• Material Aluminium-Sandwich

Suspensions

• Stiffness KMS 2.17N/mm
• Compliance CMS 460µm/N
• Equivalent volume to the compliance VAS 26.7L
• Mechanical resistance RMS 2.18N·s/m

Dimensions

• Nominal diameter 8″
• 190mm
• Baffle cutout diameter 170mm
• Overall depth 153mm
• Flange thickness 16mm
• Mounting depth 137mm
• Volume occupied by the driver (estimated) 2.9L