Yes, just switch the voltage selector on the rear panel to match the AC power in your country before powering them on. We recommend changing the fuse when using a different voltage.  For 220 volts, here's the value you would need:

5mm x 20mm - 1.6 amps @ 250 volts

The power cable is detachable on our powered speakers which makes it convenient to replace the AC plug with a different type if you don't want to use an adapter plug.