Pass XA 160 review:life span is 6 years?

The Sun actually comes with a lifetime Warranty against manufacturer's defects, misuse, accedental breakage, gravitational collapse, supernova events, and Acts Of God. In case of Sun core failure, the star will either be serviced and fixed on site, or replaced entirely at the manufacturer's discression. Expected lifetime is 10B (billion) years of uninterrupted class G operation--which is even a little hotter than class A used in the Pass XA series. Eat your little heart out, Nelson Pass!!

John, XA series does not replace X series. Replacement for X series is X.5 series. X150.5, X250.5, X350.5 have been released already. X600.5 is likely to be released sometimes after CES in January.

Jmcgrogan2, you are correct, XA Pass series is pure class A. Conversely X.5 runs in class A/AB. There is a thread I started a little while ago that discusses the design/sonic features of the Pass X.5 series and compares them with the old Pass X series. See:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1100367851&openmine&zzGuidocorona&4&5#Guidocorona
I will post there any new information I will acquire on these amps.

The Pass Labs site has just posted an excellent comparison of XA160 vs X600 authored by Dr. Poltun, director of the archives at the Vienna State Opera. You will find it as a downloadable PDF file at the following URL:
http://passlabs.com/amplifiers/xa160_reviews.htm