The Rockman tone was designed specifically to fit in a specific frequency range. That was the point. He designed it to fit the sound in his head, plus fit in the frequency spectrum that was left over after all the layering of the mixes. Then they tweaked it a bit more in post production to get that Boston sound.
I used them for years and loved them, but eventually the tone got a bit dated for what I was doing and I went the way of overdriven Marshalls, Laney, etc.
I still dig the tone, but it doesnt fit what I am doing. Tom is a genius engineer though. All the mods he does to his guitars and gear are fascinating.