I did a search and found some nominal results, but I figured I'd create a thread to ask about this. I have an old DOD FX90 Delay that requires a 10v adapter with a positive plug end. I went to Radio Shack and was slapped silly by the helpful clerk - apparently, they don't have 10v adapters. I have an old DOD Bass chorus that appears to be rated the same way, but is being powered with a 9v adapter with positive plug end. No problems have arisen as a result. So I'm wondering what the ramifications are of using a 9V and if anyone has any recommendations on how to find a 10v adapter. Thanks!