I tend to agree with @carlsbad2. If your system does not sound good at a reasonably low volume level, it needs work. Fortunately, the work doesn’t need to be substantial, and you don’t need high-sensitivity speakers to achieve that.
In my rooms, with an ambient sound level of 25 dBA, 65 dBA is pretty loud to me. I usually listen at 55 dBA during the day and 45 dBA on quiet nights. I don’t have high-sensitivity speakers like 95 dB/1W/1m. To hear my system well at 45 dBA, I need to perform room correction and EQ. The end results are pretty close to the ELC (Equalized Loudness Contour) human hearing perception level at nominal SPL—everything is dialed in. Bass is articulate, tonal balance is right and life is good.