My finding too. Especially where bass is fully present to begin with. Anecdotal evidence seems to suggest that if it is down to begin with, it may drop out at lower levels.Until you hit the limits, loudspeakers are pretty linear in terms of power in to SPL out. They don't suddenly "lose detail" as you turn the volume down.
A couple worth looking at may be the Jeff Bagby designs -
Continuum - uses a morel tweeter so a familiar sound plus Arum Cantos 5.25 poly woofer.
Continuum II Loudspeaker Kit - Meniscus Audio
Kairos - SB satori drivers, a step up in price but gets universal praise.
Kairos Full Kit (Pair) - Meniscus Audio
If you feel the need for more bass in the future you can add the 10” box underneath.
Box
Something in the middle may be the new Traveller design by Jim Holtz
The Travelers Loudspeaker Kit - Meniscus Audio
Just a few thought to get you going.
What are you looking at, that tells you the Kairos will sound better than the Travelers kit?
Im wondering if less BSC is what the problem entails. Too much at lower volume makes speakers dark, and this could be the issue at hand. How close are they to a wall? WAF likely tells me they are very close to a wall.
Later,
Wolf
Later,
Wolf