Thsi tutorial states you need a 12 v power supply.
Intel Edison Getting Started – A Step-By-Step Tutorial (windows) - YouTube
I've purchased a 9v supply.
http://ca.mouser.com/ProductDetail/Cincon/TRG1509-A-12E03-Level-V/?qs=XuJNf8XTLBSTJmczjZCk9w%3D%3D
Will I be ok? I think the acceptable range is 7-15V