So, a couple of ways to do this but first trouble shoot:
1. Is it a room mode or a headphone mode? If so, make a note and reference on a system you know inside out.
2. Just play in a sine wav on the same note the "bass" would have been. Cut the bass do your thing to it and put the volume up till the song is nice and warm
3. Do it old school. Duplicate the track, warp and -12, -24 or -48. Cut with eq and you will have a warm low end.