I have two 4 ohm cabs I've been meaning to run together for a while. My Ashdown head doesn't go below 4 ohms, like most heads. I was considering a power amp. But even the lightweight ones take up a bit of space. I don't run racks, so by the time I add a 2u rack, I'm lugging a lot of stuff around just for two small cabs. Also, a good power amp can cost just as much as a decent micro head. The Carvin I was looking at was around $500, where around the same price, I can pick up a super lightweight GK micro head. Is there a difference between running my ashdown head into a 2 channel power amp into my two cabs or running my head with one output into one cab , preamp out into power amp in of a microhead, into the second cab? I would much prefer the microhead option. Saved weight and also I have a backup with me if one head goes down.