Low volume (loudness) listening

This Chase RLC-1 Remote Line Controller is ideal for your needs.

https://www.ebay.com/itm/257022464525?mkrid=711-53200-19255-0&campid=5338381866&toolid=10001&customid=37ac0286-4a3d-11f1-a5a7-353961333135

I use one in my main, office, and garage/shop systems. Direct, or alternately thru a tape loop, you cannot tell it’s in or out, 105 db S/N. No moving parts, all done via a single Philips chip

innards of one of mine

In addition to 4 line in options, it has remote: volume, mute; balance; treble; bass

and, for you, anyone listening at low volumes

Automatic and Progressive Bass Boost. 

setup:

Chase Default volume is low, with no bass boost.

Set your preamp to your normal listening level, never change that.

Now, using the Chase for remote volume, go louder, no bass boost. go below it’s default level, it begins and as you lower the volume more, it automatically and progressively implements bass boost, which keeps the Jazz Bassist part of the mix (otherwise the bass would be gone due to our ear’s non-linear curve).

You must have a remote, no controls, just indicators on the unit. I’ve never had a remote break, but people lose them, sell them without a remote.

I'd be sitting as close as possible to those speakers, they are gorgeous!   :)

Greetings!!!!!
The obvious path is to isolate the bedroom where yor wife sleeps.

Replace the door with a solid one and fill the bottom gap with a broom type device

You’ll be able to add some db’s without bothering the boss

Cheers

Just ordered Loki Max. Thanks and I hope it works as intended  over here. 

What about higher sensitivity speakers for those quiet night sessions?

Yeah, I know it is not convenient to swap out cables, and having four speakers takes up more space. BUT it would work perfect, especially a single driver full range one. It is very cool to have two different speaker setups for different situations. Banana plugs makes the cable swaps very easy.

But then again the headphones would also accomplish this easier.

Good luck with the Loki and another box and cable set into the signal chain.