I got a pick between these two but I can't find a lot of info on the 4x12. Seems like it was quickly discontinued by Ampeg. All I know is that it's loud (which is good) and big and heavy (which is okay because so am I). And it was made for Geezer Butler which can't be a bad thing. But nobody else seems to be playing them. Also I play deathmetal so I'm not looking for hi fi subtleness. From what I've read on here they shine most through an SVT tube head. I however plan on running my Sansamp RBI + poweramp rig through it.