I am finding that some of the older jazz albums are good tests of both my speakers, and my dacs/headphone amps/headphones.
For instance https://www.amazon.fr/Private-Collection-Charlie-Haden/dp/B0039TD75Y contains plenty of bass and piano playing, to test the equipment. It is on the NAIM label, so the recording quality is good as well.
The track The Wolf That Lives in Lindsey, from this Joni Mitchell album, is regarded as very revealing for vocals and transient response.
https://www.amazon.co.uk/Mingus-Joni-Mitchell/dp/B000002GWV
Happy testing......................