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All systems go !



Accuton C220-6-221 Ceramic Bass / Midrange

8.5 inch 6 ohm Ceramic Bass / Midrange.

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The Accuton  C220-6-221  Bass / Midrange is an esoteric 8.5 inch drive unit primarily intended for 2 and 3 way floor standing loudspeaker designs.

This high end driver features a ceramic (Sapphire) cone, soft rubber surround, large ferrite magnet and 38mm titanium former.

The spider, pole and voice coil former are fully ventilated for minimal compression. This driver has a substantial power rating of 150 watts and offers very good midrange resolution / extension for a unit of this size.

This drive unit is also available in 11 ohms impedance (for tube amps or parallel array) here :  C220-11-221

Full datasheets can be downloaded from the bottom of this page.

Here are some box alignment examples:


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)

Infinite baffle:

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)

A matching passive radiator is available :  Accuton P220

Key Features:

  • Ultra hard ceramic cone (Corundum / Sapphire)
  • 220mm diameter chassis with protective grille
  • High power 38mm voice coil assembly
  • Overhung motor, titanium VC former
  • 32 Hz - 2 KHz in vented box
  • Long throw max. 10mm
  • Large ferrite magnet

Basic Parameters:

    Resonant frequency (fs) 28Hz DC resistance (Re) 5.8Ω
    Mechanical  Q factor (Qms) 7.4 Power handling 150W
    Electrical Q factor (Qes) 0.39 Sensitivity (2.83V/1m) 90dB
    Total Q factor (Qts) 0.37 Chassis diameter 220mm
    Equivalent volume (Vas) 79L Cutout diameter 191mm

    Click icons to download :

    .pdf iconData              .pdf icon3D View (large file)                                                                          

    .pdf iconDimensions

    Built to order - contact us for a lead time.

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