Recommendations for speakers that sound great at lower volume levels.

I have owned the Harbeth M30.1,C7 and the newer P3ESR. In my 20x15 size listening room using tube amplification the original P3 just sounded better. I always prefer a sealed speaker better than any speaker with ports. BTW, I have tried many different speakers and I always go back to the P3. I have owned five pairs so I learned my lesson not to change to other speakers just because they are pricier and bigger!
This guy likes them like I do!
https://www.youtube.com/watch?v=mqFIaiPT_kY

Ha! I've seen that review. Very thoughtful evaluation and presentation.

I’ll give another endorsement for British mini monitors. I have small to smallish listening rooms. I also listen more times than not,at low volume. My Graham Chartwell LS3/5’s do a wonderful job at low volume. They soundstage freakishly well. I also run them with a couple low power First Watt amps. They will always be in the rotation for me. The great thing with these mini monitors,is you can flip them if you don’t like them,and probably break even at worst. 

I think the persona B could be on the list. 

+1 on the LS3/5a... had an 11ohm set of Rogers from the mid 80s and just loved them. Wish I still had them... playing a set of Equation "7" these days that are just incredible in my kit. Listen late night in a dead quiet room and paired with a Cary tube amp and Manley Shrimp tube pre they are incredible. Won't find much on the web and the distributor in Canada, Mutine, got beat up pretty good on here a while back but they are special. All hand made in Belgium with the finest components and internal wiring. Had no idea what to expect other then they mated well with
low powered tube gear. The "7" were the bottom end of their line and retailed for $3K in '05. Said to be perfect symetry between Equation speakers and Audiomat electronics; the Arpege integrated specifically. Have heard the Audiomat gears and sadly never got the chance to pair them togther. Anyway, fabulous at low volume - everything's there full and robust. A real treat if you can come across a set. Maybe $13-$1500 depending on condition; worth every penny.