i have owned and used DIRAC mini dap and DEQX HDP-4
the DIRAC was easy to use and pretty good results by I expect you could achieve very similar results with the Roon EQ and using your ears.
DEQX speaker correction was a clear win however you need a lot of patience and and hard work to fully understand and implement the rest of it effectively. great if you like this type of project where you can experiment endlessly but perhaps also leaves you constantly wondering if you have achieved the best results or not!
for a bass issue (and where room treatment may not be pratical) i would use Roon EQ by ear, and experiment with speaker placement.
the DIRAC was easy to use and pretty good results by I expect you could achieve very similar results with the Roon EQ and using your ears.
DEQX speaker correction was a clear win however you need a lot of patience and and hard work to fully understand and implement the rest of it effectively. great if you like this type of project where you can experiment endlessly but perhaps also leaves you constantly wondering if you have achieved the best results or not!
for a bass issue (and where room treatment may not be pratical) i would use Roon EQ by ear, and experiment with speaker placement.