most clear, crisp sound power amps, monoblocks ?

Live sound is only relevant as a reference if unamplified...otherwise get a PA system and sit 100 feet from it. My current hifi system sounds great to me, but that's likely due to ear damage and personal taste developed from spending over 4 decades as a musician and live sound mixer, which I still do and from which I shall never recover.

Narcissi,

There's a lot of learned people on this forum who are willing to help but your criteria is seems too vague to permit them to render much assistance. Since you must have something in mind and I assume will know it when you hear it, I'd suggest that you visit several audio stores and audition some systems.

Good luck with your search.

When I think specifically of crisp and clear and not necessarily other "good" qualities of speakers and amps, I think of good electrostatics. The most capable I have heard for the cost is Sanders Sound. That's just my opinion.

stats, stats and only stats.

Sksos1-I would agree with you, provided the OTL saw the speaker and not the crossover.