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!!

Is the warranty on the sun transferable to subsequent owners

There are many X-series for sale because the XA series is out. Caps are usually the only long term maintenance issues for these big solid state amps. The higher biased the amp runs into Class A, the better it sounds (IMHO). However, the higher biasing leads to more heat, and eventual cap replacement is required. If you have a $5-10K amp, and figure you have to replace the caps every 10-20 years (depending on use and bias), that's still a lot less maintenance than tubes. Replacing the caps cost is between $200-$800 once shipping is factored in.

If you don't turn the amp on the caps will last longer.......just a thought.

Cheers,
John

Even the sun does not stand a chance against fedex & UPS ground

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.