For sub this Naim download is pretty effective;
https://www.naimaudio.com/news...ccallum-city-out-now
Impromptu is excellent for both categories;
or this one with a comment from the computer audiophile forum;
[quote]Placement is perfect on this young audiophile classic as well as the near perfect natural recording of the voice, but the real test for audio equipment when listening to this recording is it's ability to separate the kickdrum from the upright bass.
The two instruments are playing the same pattern. On less than optimum equipment it might be difficult to separate the two, but with good setup you clearly hear the upright at 10.00 and the kick dead center with a nice decay that one generally do not hear on commercial recordings.
There are lots of speakers and headphones with ''extended lows'' but low with definition is a whole different ballgame. [/quote]
both from Sound Liaison; http://www.soundliaison.com/