accuton C220-6-221

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.3dB

Thiele & Small parameters

• Resonance frequency (free air) fS 26.3Hz
• Mechanical quality factor QMS 7.10
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 112cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.83mH
• VC Diameter 38mm
• Winding material Copper
• Former material Titanium

Magnet

• Force factor Bl 8.7N/A
• Motor constant Bl/√RE 3.47N/√W
• Diameter 120mm
• Height 42mm

Diaphragm

• Effective diameter 169mm
• Effective area SD 224cm²
• Moving mass MMS 30.4g
• Moving mass (without air load) MMD 27.9g
• Material Ceramic

Suspensions

• Stiffness KMS 0.833N/mm
• Compliance CMS 1200µm/N
• Equivalent volume to the compliance VAS 86.2L
• Mechanical resistance RMS 0.71N·s/m

Dimensions

• Nominal diameter 8.5″
• 220mm
• Overall diameter 220mm
• Baffle cutout diameter 191mm
• Overall depth 105mm
• Flange thickness 9mm
• Mounting depth 96mm
• Volume occupied by the driver (estimated) 1L