How would a vintage Boulder 500AE compare to modern equivalents?

Hi Guys!

I have one of the above, a Boulder 500AE. I'm not sure how old it is as I got it second hand. No work has ever been done to it and it still sounds okay.

But, I am curious to know your thoughts on how it would compare to a modern power amp, and do you think there would be any point in replacing its capacitors?

Sorry can't compare as its ancient history.

I'd email Boulder directly to ask if if any service is suggested.

Been way too long since I heard one, but it was darn good when I did - early 1990s.