Rockport Avior II's in 19x24.5 room?

That’s not a huge room and the Aviors go down to 25Hz (-3dB) so I wouldn’t be too concerned about that. 

I had them in a 22x22x13H room and they had no problems.  Fantastic speaker.

Rockport Avior II speakers  are expensive ones.

Does your  

• Krell FPB-400cx 

will do justice to these speakers ?

Rockport Technology  with Vinnie Rossi : a good match 

https://pt.audio/2023/04/20/vinnie-rossi-and-rockport-axpona-2023/

The krell amps do well.they don't make them like they use to.its hard to find an amp these days that kick out the amps that krell does.they have huge transformers. Currently listening to accuphase m1000 4 kw into 2 ohm late 80s still going strong.those krell 400 will produce close to 800 watts in 4 ohms with the amps to drive it. You would have to get michi m8, hegel h30 mono,mcintosh 1.2  or such to come close. I have had my krell 600,650 m0no ,700 all serviced by krell within the past year and it was worth it. Now my meter likes d sonic 1.5 kw😃 enjoy the hunt.would like to hear Rockwell top of line.let me know if you have one I'll pack a lunch and make a house call