I just picked up an Ashdown MAG 600 head (pic of the face below) Couple of questions; Anyways, if anyone has some advice on settings, I play metal/sludge, the sound I'm going for is maybe somewhat along the lines of Isis, Neurosis etc. Just big and crushing basically! I'm running this through a 4x10 & 1x15. Also, I was told that it's a better idea to run the 1x15 out of the "sub out" as opposed to just speaker out as it gives a bigger low end. Any opinions on that? And lastly, this is a rack mount type head, is there a sleeve or casing type thing that I can get for this? Thanks in advance, D. Cash.