PASS - comparison X 350 to XA 60.5

In my opinion, newer would be better, but also much more expensive...

Ok, cool. And yes of course, but you get what you pay for.

JI35,

I do not think there are any changes in the amps at all over the years. If there are, can you confirm what they were? I am quite certain there are not any.

There is zero difference between a new pass amp and an old one. Identical, Any change results in a new model. These posts are misleading.

There is no difference between a pass amp built yesterday or 9 years ago. When a change is made the model changes. If the model has not changed then nothing else has either since the original design.