SPEAKERS THAT SOUND ALIVE & DYNAMIC AT LOW LISTENING LEVELS

RC + PEQ from Wiim, possibly with a Umik-1. You could EQ the L/R channels separately as well as the subwoofer to achieve better integration of the system. Minimize possible phase shift with proper settings in Q, slope, target curve, and so forth. Very effective. Not compared to the Loki Max yet, but I believe the digital EQ coupled with RC is more precise / effective than analog EQ.

Right now, at 5 AM, my room's ambient noise is about 25 dBA, and I'm listening to my system at 50 dBA. The low frequencies below 100 Hz are boosted by about 5–8 dB (I limit it) using PEQ. The bass notes in this setting are clean and articulated. The overall soundstage shrinks, but hey, let me know if you have a better way to maintain a similar soundstage at this low volume level.

I agree that hearing aids should be your first upgrade. A nice tube preamp might be next step. 

@deep_333 I have long been intrigued by that speaker pictrued but have never heard it. At 103 dB/watt is should excell at low volumes. I do worry that it doesn’t have the mid bass driver that this manufacturer usually uses. However, the designer prides himself on a flat frequency response so I’m sure he has it figured out. I do have a lot of experience with this brand (although not in my system right now) and the low mass midrange array is one of the best upper midrange performers I’ve ever heard and it does sound great at low levels.

Jerry

Try hORNS out of Poland. Beautifully engineered and designed speaker line that give Avantgarde a run for the money.

I have the hORNS Universum MK4, paired with Jeff Rowland 925 monos and Rowland Coherence II preamp. Sounds amazing at low volume regardless of the input.

I would recommend looking at Joseph Crowe Audio for a pair of horns. 
he makes numerous options that are perfect for low level listening, which is how I listen most nights.