Here are some easy tricks to try with Roon DSP parametric EQ that I think are useful in many cases, especially for cases of older ears and listening at lower volumes.
1) roll off bass levels below the frequency that your speakers tend to normally roll off in your room. Your amp will thank you by lowering its load and allowing it to do a better job with the frequency your speakers actually cover well.
2) If you measure and detect bass modes, Provide a bump in the right direction to help level that out. This is not a substitute for room treatments to address bass issues but can help if targeted properly.
3) try a 3db (or more or less maybe) boost from 4-6khz centered at 5 khz. This adds a bit of edge to the sound that older ears in particular may appreciate, especially at lower volumes. Think making your lower efficiency speakers sound more like a quality pair of high efficiency horns. You will probably not have to turn the volume up as much as well for things to sound sharp and clear.
4) For older ears in particular, consider a treble boost starting at around 10khz or higher, depending on the particular ears used. A hearing test can help establish how well high frequencies are heard, but it is pretty much always the case that as our ears age our ability to hear up to 20khz as one may have done easily when young is no longer a reality.
5) If you are not listening on-axis, consider measuring the distance to each speaker from listening position (in centimeters) and set up Roon DSP speaker correction accordingly for a more coherent sound at your off-axis listening position. You might also decide to add a db boost or decrease to left or right speaker. This is DSPs way of providing a balance control like the analog kind that pretty much all hifi gear used to have.
6) If you are listening well off axis from tweeter direction, additional treble boost at higher frequencies may be desirable.
Roon DSP makes it very easy to apply each of these in separate filters that all work together and then tweak each as needed to fine tune the results. Make sure the DSP does not introduce clipping as indicated in Roon as the music plays. It’s a good idea to use headroom management in Roon DSP to protect against that. I find I tend to like having headroom mgmt active in most cases anyway, but that may be a personal preference thing. If Roon indicates clipping (red indicator) during playback with DSP enabled, individual filter overall volume levels can be lowered as well to avoid.