Maybe im wrong but I can’t see how it would benefit Pass Labs to stick an XP-12, XP-17 and an XA-25 into the INT60 at a $6K differential.
Well first of all, I don't believe that the INT-60 has a phono stage, so you can eliminate the XP-17. So now you are talking a XP-12 and a XA-25 ($10,700) versus a INT-60 ($9,000), a difference of ($1.7K), less that 20% difference, which can easily be done by using one chassis and one set of packaging vs. two of each. My guess is Pass Labs profit margin is the same regardless of which way you want it.
I get that many folks have the preconceived idea that separates are always better than an integrated amp ingrained in their heads. That is what many years of marketing can do for a industry, sell more boxes.
However, there are a LOT of stunningly good integrated amps out there on the market today, including that Pass Labs INT-60 model, along with brands like VAC, Vitus, Solution, Boulder, Accuphase, Goldmund, D'Agostino, Rowland, Kondo Audio Note, darTZeel, Shindo, etc., that would embarrass most separates.
I went with separates because I did not want the preamp and amp to be from the same manufacturer (I prefer tube preamps with SS amps).
If I had wanted a Pass Labs preamp with my Pass Labs amp, the INT-60 would have been awfully tempting to me, especially when you consider how much you could save on power cords and interconnects too.
However, that is just me. Everyone is entitled to spend their money however the choose.