How to get the impact of a live concert?

it sucks that you have to pay for an astronomically-priced Focal, Kharma, Wilson, Rockport, etc. speaker system. but with adequate amplification with the right sources AND a well damped room, you CAN get (95% of) the impact of a concert performance. but it is extremely rare to come by an audio store that is willing to put that kind of a system on display. the day i got a glimpse of what is possible, on the other side of the room the Wilson WAMM speakers were placed was a Goldmund Reference turntable, and a rack of some of the best and most exotic gear available at the time. the speakers were driven by a pair of Levinson 20.6 class-a monoblocks and a bridged-mono bryston amp for the subwoofers (2 X 18 in. in 6 foot tall cabinets) . the room was magic whatever they played in it.
i'm no expert but high-end audio at the extreme end of the scale is pretty phenominal if it's set up correctly.

I'd personally feel a little weird sitting alone in a huge room in my McMansion with huge speakers driven by mega watt amps...listening to my fave little jazz trios? I'd have to get a smoking jacket or something...Bach cello suites blasting away...really? I'm seeing Sonny Landreth at a cool local venue this weekend...seen him before and he's amazing...but I don't want Sonny and his band in my hifi room. I like his recorded stuff plenty, but live is to be seen live, and I enjoy the difference.

I don't think there is any way to acheive live music dynamics in a home environment. As you said large speakers and big power will likely get you the closest if thats what you seek. A sub or two may help if your current speakers are bass deficient, but speakers are designed with a delicate balance and a sub will mess with that. I still prefer sound quality to huge dynamics that always come with high DB levels.

One may get close to the live impact...but will never truly get there with today sources.

There are many home speakers that can reproduce live dynamics if you put a band in the middle of them (lascalas, khorns, and many other horn speakers).

NO ONE can disagree that multiple sets of lascalas driven with 1kw of crown power could reproduce a band VERY loudly....(makes me wanna puke just thinking of that combo)

but the source is the issue IMO...

Zu audio speakers use pro drivers based on those used in most Marshall stacks etc but modified for domestic use. I've never heard speakers with more guts, shove and scale....... Sure they're 101db but you can power them with 300w and no compression....... Dynamic scale, head room and speed are so unusual compared to HiFi speakers.

Live music is where it's at for me....... Normal studio based CDs are lacking in musical emotion ........ But maybe I'm not normal l!!!!!