New Pass Labs X.5 series versus previous X series

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.

Some more tidbits I just gathered from Pass: while specs on new X.5 series will be virtually identical to older X series, the implementation of the class-A portion of the amps has been changed from push-pull class-A, to a single-ended class-A design. This has apparently significantly reduced time-smearing of low level detail and is generating a much more layered and finely detailed image.
The ultimate goal seems to be to maintain the high current/power of the powerplants of the X series while re-capturing some/most of sound characteristics/magic of the original Aleph series through the single-ended class-A implementation.
X350.5 is complete and is being delivered to dealers. X600.5 still in engineering. Stay tuned.

What was Peter's feedback concerning the X350.5?

Guidocorona, that's a very interesting tidbit! Thanks for passing it on.