accuton C168-6-990

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 4.76
• Electrical quality factor QES 0.22
• Total quality factor QTS 0.21

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 40cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.06mH
• Winding material Copper
• Former material Titanium

Magnet

• Force factor Bl 11.7N/A
• Motor constant Bl/√RE 5.02N/√W
• Diameter 146mm
• Height 28mm

Diaphragm

• Effective diameter 130mm
• Effective area SD 133cm²
• Moving mass MMS 16.1g
• Moving mass (without air load) MMD 14.9g
• Material Ceramic

Suspensions

• Stiffness KMS 1.92N/mm
• Compliance CMS 520µm/N
• Equivalent volume to the compliance VAS 13.1L
• Mechanical resistance RMS 1.17N·s/m

Dimensions

• Nominal diameter 6.5″
• 168mm
• Overall diameter 168mm
• Baffle cutout diameter 147mm
• Overall depth 50mm
• Flange thickness 6mm
• Mounting depth 44mm
• Volume occupied by the driver (estimated) 0.26L