Hi, saw your post about the Samson qh4 4 channel amp. I'm thinking about getting one for myself. Sound quality wise, based on the reviews I've seen, I'm sold. However it's unavailable here in Asia but I will have a chance to order from the US. I'm just not sure if the included power adapter can be plugged to a 220v wall socket. By any chance, does this come with an adapter that has universal voltage? Thanks in advance