Accuton C220-6-221

8.5" (22cm) Keramik- Tieftöner, 6 Ohm

Highlights:

• 8.5 inch bass-midrange for 2 or 3-way floorstanders
• medium sized voice coil with 38mm titanium voice coil former for high midrange resolution 
• version with 6 Ohm impedance
  

Vented box design parameters:

• Vb: 51L, Port diameter: 70mm, Length: 265mm, Fres: 26.5Hz, F-3dB: 34Hz, Q: 0.58 (optimal)
• Vb: 83L, Port diameter: 70mm, Length: 110mm, Fres: 29Hz, F-3dB: 28Hz, Q: 0.50 (extended bass)
• Vb: 43L, Port diameter: 70mm, Length: 220mm, Fres: 31Hz, F-3dB: 35Hz, Q: 0.61 (0.7dB Ripple @ 50Hz)

Closed Box design parameters:

• Vb: 29L, -6dB @ 40Hz, -19dB @ 20Hz, F-3dB: 50Hz, Q: 0.71 (typical)
• Vb: 83L, -4.5dB @ 40Hz, -13dB @ 20Hz, F-3dB: 60Hz, Q: 0.50 (extended bass)

Mechanical Data:

• Overall diameter/square: 220 mm
  
• Cutout diameter/square: 190,5 mm
  
• Frontplate depth: 9 mm
  
• Overall depth: 105 mm
  
• Motor assembly depth: 42 mm
  
• Motor assembly diameter: 120 mm
  
• Screw fitting:  DIN 7984, 4 mm
  
• Terminal: + : 6.3 x 0.8 / - : 4.8 x 0.8
• Shipping weight /net weight (one piece): 2,4 / 2,1 kg
  
• Shipping box size (pair): 250 / 145 / 250 mm

Thiele / Small Parameter:

• Sensitivity Lp (2.83V / 1m): 90 dB
• DC-resistance Re: 5,8 Ohm
  
• Resonance frequency Fs: 28 Hz
  
• Equivalent volume of air Vas: 79 L
  
• Mechanical Q Qms: 7,4
  
• Electrical Q Qes: 0,39
  
• Total Q Qts: 0,37
  
• Effective piston area Sd: 227 cm²
  
• Moving mass Mms: 30,9 g
  
• Suspension compliance Cms: 1,08 mm/N
  
• Mechanical resistance Rms: 0,72 kg * s

Voice Coil Data:

• Power handling P: 150 Watt
  
• Linear excursion xmax: +/- 5 mm
  
• Voice coil diameter: 38 mm
  
• Voice coil former material: Ti
  
• Voice coil material: Cu
  
• Voice coil inductance Le: 0,8 mH
  
• Force factor Bl: 8,9
  
• Motor type: Overhung