4) Do you find the sound to be veiled in anyway?
this is the kicker question. Here is where the Pass sound really shines for me. Transparency. I have never heard an amplifier bring absolute stunning transparency to the scene as Pass. It is spooky! how transparent Pass amps can be. Literally, hearing new details and delicacy in music I’ve heard a thousand times before. When I heard that …and felt it….I knew these amps were special beasts.
I appreciate that the above impressions are based on the Pass Labs XA60.8 mono blocks and a Pass Labs XP-12 preamp. Nevertheless, these are separates and not the integrated that the OP is asking.
Steve Huff has compared the Pass Labs INT250 and INT25(which he owned for a period of time) to the Luxman L-590AXII. Transparency to me represents detail, and the Luxman is said to sound more detailed than both Pass units.
Reviews in the links below with their respective excerpts;
Pass Labs INT-250 Review
"Luxman 590 AXII – Sweet, a little leaner than the Pass Labs with more detail so this is more for those who crave sharpness and detail over warmth and liquidity. Class A 30 watts but what it lacks in body compared to pass it makes up for in sweetness and dynamics. Made in Japan."
Pass Labs INT-25 Review
"Some may wonder what I think of the INT-25 compared to the Luxman 590AXII which is another beautiful heirloom quality integrated that comes in at around $9000. I could live with either but I would be happier with the Pass with my current speakers. The Luxman is more detailed, and has a thinner mid bass."