I have recently purchased 2 Gridseed G-Blade Miners, not realising the power supplies didn't come with them.
Do I need a specific PSU to power them? Or can I get an AC adapter and plug them straight into the wall?
Either solution will work fine. For reference, check out these two setups:
https://www.youtube.com/watch?v=nCjSQMsdlKg
https://www.youtube.com/watch?v=2QrkWR5HdcQ
The former video illustrates use of AC adapters and the latter illustrates use of an external PSU.