Pass Labs int 250 and int 60

For those with a Pass Lab INT-60 amplifier, I have found that replacing the fuse with a Synergistic Research Blue fuse made a nice improvement. It is an easy experiment to do as the fuse is on the back of the amplifier. Plus the Synergistic Research fuses come with a money back return policy.

 This improvement also holds true for the Pass Labs First Watt series. Pass Labs big amps use circuit breakers so no opportunity to upgrade fuses.
David Pritchard

The only experience I've had with Pass Labs gear was auditioning an int 60. And it sounded superb. I thought it sounded incredibly sweet, yet solid with just the right amount of warmth. I've read that the int 250 is very similar. More relaxed, yet with tighter bass and sweet top end. As you might expect with 250 wpc the int 250 has a very tight grip on the speakers with a very clean and focused bottom end. Every comment I've read about Pass' service said it was exemplary. IMHO, Pass makes outstanding products.

I have Wilson Sasha 2 speakers, which are hard to drive at low impedance. I currently use separates - an ARC GS150 tube amplifier and a McIntosh C22 preamp. Would the Pass INT-250 constitute a reasonable replacement for these tube-based separates? Thank you in advance.

It will depend on how hard the speaker is to drive.  

I compared both in my system and currently have int-250. 
Even so the sound signature is the same, the INT-250 is more extended at top and bottom and deliver more relaxed presentation with slightly bigger soundstage than INT-60. Read reputable and honest (for me) review from guys at audiodrom. The INT-250 got very high score of 92 out of 100 and their comments are spot on. I tried many integrated including plinius histo, gamut 150le, luxman 509x, mark levinson, gryphon diablo 300, vitus 100  and to my ears  and in my system the pass int-250 was one of the best, loosing some attributes like dynamic swings  and on some recordings micro details to gryphon diablo-300. If you get one you have to get a great power cables and speaker cables that synergetic with this pass in order to hear what it is capable of.