Hi, I'm sure this Q? has been answered somewhere already, but relly dont have time to search through the hundreds on Ampeg threads... If anyone knows the answer off the top of their head, please help! I just brought an Ampeg SVT2 amp head, second hand and I'm confused as to what spec cabs I need to run it? On the back, it says: 300W at selected impedance - with a switch between 2 and 4 ohms and two 1/4" output jacks. I have two Trace Elliot cabs on the way (1x15" + 4x10") which I'm planning to use with it, but ideally I just want to use the one cab to start with. I understand that imepdance is a measure (in ohms) of resistance but I dont know how this shoudl dictate the combination of amp + speakers or what effect it will have on volume or sound quality???? Please advise!