hey im aware of the differences concerning ohms, but im not really sure what the advantages and disadvantages are. i mean, lets say i have an amp which kicks out 300 watts at 8 ohms and a cab to match. but i also have an amp the outputs 300 watts at 4 ohms, also with a matching cab. what are the advantages and disadvantages of both? or is there essentially no difference at all? any explanation would be perfect! thanks!