Found this old interview.
JP: Falling Into Infinity was done at Avatar, just like Systematic Chaos. Kevin Shirley recorded that record, produced it, an engineered it, and one of the things I totally remember is that we had all of this Boogie stuff in one room. We actually made a poster out of it. I borrowed cabinets – they sent me cabinets. My goal was to pick the perfect cabinet. I had 4 x12s with ninety-watt speakers, and halfbacks, and all these different things. That’s when I discovered and fell in love with the 4 x 12 Rectifier Traditional cabinet, which is what I’ve used ever since.
MPc: Do you use it with the Celestion Vintage 30s?
JP: Vintage 30s, but on Falling into Infinity we experimented with everything, like the twenty-five watt greenback speakers. I had every Boogie head you could imagine in this room. It was like a guitar store – it was awesome, and we centered on that cabinet and I’ve used that cabinet ever since. I think it sounds really natural, just the way it resonates and everything.