most clear, crisp sound power amps, monoblocks ?

The range of answers here is awe-inspiring. Condescension to curmudgeon; elitist to judgmental. And even a few well-meaning answers thrown in. Bojack had it right - lighten up, audiogoners. This is a hobby forum, not a philosophical statement of identity.

Seriously, if the OP were my first post, these answers would only serve to edify the misconception of hi-end audio as the domain of the self-absorbed and out-of-touch.

Having said that, I do agree that the question is much too vague to give any legitimate empirical answer. But Mitch4t and a few others already suggested a good way of saying it without reverting to trolldom.

When I come across a vague question and I think I can help, I do. If not, I move usually just move on.

The "live sound" reference idea is lame, meaningless, and should be abandoned. Maybe replace it with "well recorded" or "sounds good to me."

See what happens when you ask a simple question on this site Narciso? It's typical so don't feel too bad! I like Output Transformer Less (OTL) amplifiers matched with the proper speaker. If you are not familiar with these and you are new at this I'm not too sure you would want to start there, something simpler perhaps. The bottom line is you might want to supply a bit more information in your listening tastes and preferences, room size etc. If you are new to this it is imperative that you go out and listen to some systems to get a better idea of what might float your boat. No one here is going to satisfactorily answer your question, you picked the wrong place. You are most likely going to get overwhelmed with the variety of responses. Listening is the best way. Unfortunately there are few shortcuts unless you just want to put together a simple system that is musically satisfying. This is where a reputable dealer can help. Have you seeked one out to help you? Probably a good idea to do that first.

Most would agree that the better gear is the more natural or neutral they sound. I have found that as gear improves, even though there are differences, the best sounds more alike than different.