accuton S220-6-221

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB
• Frequency response 31 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 22.1Hz
• Mechanical quality factor QMS 5.73
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.37

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 5.9Ω
• Inductance (1kHz) LE 0.81mH
• VC Diameter 38mm
• Winding material Copper
• Former material Titanium

Magnet

• Force factor Bl 8.28N/A
• Motor constant Bl/√RE 3.41N/√W
• Diameter 120mm
• Height 42mm

Diaphragm

• Effective diameter 169mm
• Effective area SD 224cm²
• Moving mass MMS 32.8g
• Moving mass (without air load) MMD 30.3g
• Material Sandwich

Suspensions

• Stiffness KMS 0.633N/mm
• Compliance CMS 1580µm/N
• Equivalent volume to the compliance VAS 113L
• Mechanical resistance RMS 0.79N·s/m

Dimensions

• Nominal diameter 8″
• 220mm
• Baffle cutout diameter 191mm
• Overall depth 114mm
• Flange thickness 9mm
• Mounting depth 105mm
• Volume occupied by the driver (estimated) 1.4L