From the jas obrech interview.
JAS: "How many amps do you use?"
EVH: "I had four good amps that I used to use all the time, but I don’t have them anymore. What I basically have is three different setups, three complete setups. I have three 100-watt tops of whatever make – right now I’m using Music Man, a couple of Laney amps, which are English, and a couple of new Marshalls. I’m just using everything right now because I lost those old amps. But I use like three 100-watt amps for the main set – what I call it – and then I do my guitar solo, and after that I change guitars and amps to setup number two. And setup number three is also again three amps, for backup."