SBKwan14Via the manual it looks to be made for the North American market.
'Power Supply ................. AC 120 V / 60 Hz'
You would need a step-up/down voltage converter to use with 220/240.
Update:
From Techmoan's review of the AI-501 DA (Discontinued) on YouTube:
The video shows that the unit is 120V only.
HaxtriickzYeah I hooked up my sub and it sounds pretty damn good. I'm really happy with it. I just wish I wasn't getting 5 frames of delay on my PC. I've applied a filter in MPC so my video is synced now. But games and youtube/online video are out of sync by 5 frames. I really wish the driver support was better for this. My m-audio audiophile had delay built into the drivers.