Accuton S220-6-221

8" (20cm) Keramik- Sandwich Tieftöner

The  S220 - 6 - 221  is an 8 inch bass driver with ultra stiff ceramic - sandwich dome.A  FEA optimized  overhung motor design with 38 mm titanium voice coil former guarantees very low energy storage and good heat transfer. The low loss rubber surround and a  thin fabric spider  center the moving parts with high linearity. As a typical home stereo bass driver, we recommend our S220-6-221 for an application from 31 Hz - 1000 Hz.

Vented box design parameters:

•     Vb: 66L, Port diameter: 70mm, Length: 300mm, Fres: 22Hz, F-3dB: 27Hz, Q: 0.58 (optimal)
•     Vb: 101L, Port diameter: 70mm, Length: 150mm, Fres: 23.5Hz, F-3dB: 24Hz, Q: 0.50 (extended bass)
•     Vb: 56L, Port diameter: 70mm, Length: 300mm, Fres: 24Hz, F-3dB: 29Hz, Q: 0.61 (0.7dB Ripple @ 50Hz)

Closed Box design parameters:

•     Vb: 39L, -4dB @ 40Hz, -13dB @ 20Hz, F-3dB: 42Hz, Q: 0.71 (typical)
•     Vb: 101L, -4dB @ 40Hz, -10dB @ 20Hz, F-3dB: 44Hz, 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 / 290 / 250 mm

Thiele / Small Parameter:

•     Sensitivity Lp (2.83V / 1m): 89 dB
•     DC-resistance Re: 5,8 Ohm
•     Resonance frequency Fs: 21 Hz
•     Equivalent volume of air Vas: 116 L
•     Mechanical Q Qms: 6,6
•     Electrical Q Qes: 0,38
•     Total Q Qts: 0,36
•     Effective piston area Sd: 227 cm²
•     Moving mass Mms: 33,6 g
•     Suspension compliance Cms: 1,63 mm/N
•     Mechanical resistance Rms: 0,69 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