which excels at Rock and Roll

I have Ls 50 metas + powered sub.  This is a very highly regarded setup FOR THE PRICE.  Absolutely genre agnostic as well I would say.   But only up to about 90db SPL in a smaller room.  Again, genre agnostic.  To go louder in bigger rooms there are larger and more expensive models to choose from. 

Lower cost speakers will have more limitations and hence be less genre agnostic as well. Think ls50 with limited bass extension and output or Magnepan lrs with limited bass extension, dynamics and output.  Both have real limits.  Some music will flourish but not all.   But bigger better and more expensive speakers with minor limitations are essentially genre agnostic.  I think that is what @atmasphere means.  Not that you can cut a lot of corners and still get it all with all music. 

Do you go to rock concerts much? Do you have a clear reference point in your mind for how rock concerts tend to sound? I was just at a Mdou moctar (the African jimi hendrix) concert in a smaller venue.... Never once did i clock anywhere less than a 100db and i was sitting way back..110 easy...visceral bass from a stack of huge pro subs that just never happened in your room.

I was at a deep purple concert some years ago...unbelievable resolution and clarity in a large venue at that high a spl level. 

The speakers might start to look like this...paired with a huge stack of pro subs. I have maybe 1 speaker and a big ol’ pro sub that can attempt to recreate something similar in a smaller home setting. I have lots of other speakers that just can’t do that....I am honest enough to admit that my gear has limitations. But, somehow, a ls50 is able to do all of that for you? Such a thing doesn’t happen. Go to a few concerts, refresh your sonic memory.

I have Ls 50 metas + powered sub.  This is a very highly regarded setup FOR THE PRICE.  Absolutely genre agnostic as well I would say.   But only up to about 90db SPL in a smaller room.  Again, genre agnostic.  To go louder in bigger rooms there are larger and more expensive models to choose from. 

@deep_333 are you talking to me?  I’ve been to countless concerts of all types many with excellent sound and I take my SPL meter app with me to measure volumes, often over 100db. I just related that little ls50s cannot deliver what bigger speakers of similar quality can. But they can deliver all genres very well in smaller rooms with a sub up to ~90 db SPL. So no disagreement there.  It’s the bigger high quality speakers that are good enough to do all genres well in larger rooms/venues.  Like my big Ohm F5s in my larger room.  Or higher efficiency pro speakers used in concert venues. Crazy to suggest any speaker Ls 50 size could work well alone for a loud rock concert in any size venue.  

The tektons are a fantastic speaker and yes it doesn't care what it plays.it is great at it all and reasonable priced.there are many large manufactures now copying his design.they will play louder or soft.call Eric at tekton and tell him what you want.they sell direct.that should get the party going.and yes I have a pro line array powered by crown 12000. That is what foreigner had on stage. 6 in a rack..my ker 11 could not keep up db wise.