New Pass Labs X.5 series versus previous X series

I have found the following snippet in a current Audiogon listing for the X350.5: "The new X350.5 features improved output transistors and a redesigned single ended Class A bias circuit . . . ."

I have owned X150, X250, X350 and now the X250.5. The X250.5 is by far the best sounding amp in the X series or maybe the X.5 too. I like the X250 better than the X350 and I assume the X250.5 should outperform the X350.5. The X250.5 is less aggressive, more sweet, relax, extended than the X250.

Thank you Jazzmeup. I have also seen you are putting your X250.5 on sale. What are you going to replace it with? What aspects of X250.5 are you finding dissatisfying, if any?

Guidocorona

What you have already said is about all the info that I was told by Peter Perkins at Pass Labs. He did tell me that the X350.0 is there best sounding amp in the X series. The majority of people I have questioned said the X250 was a better sounding amp than the X350 before the .5 version. However, with the X250.5 and X350.5 the majority of people I have talked with said the X350.5 is better sounding. Peter Perkins said the X350.0 has improved the most from the .5 versions. He even said it would be very difficult to have the X600.5 sound better. Please take this all with a grain of salt. I would advise you to call Pass directly and hear it from them. They are shipping the X350.5 without manuals until they get them printed with the new info.

Thanks Irish65. I am planning to call Peter at Pass next week, as -- per my info -- by now they should have a working X600.5 prototype. It would be also interesting to hear from audiogoners who have already heard x350.5 in person, or who are planning to acquire one.