I used to struggle quite a bit with creating decent bass sounds, especially on bass guitar or contrabas tracks.
And then I discoverd the Little Labs 'Voice Of God' UAD plugin. This plugin is quite amazing. You just insert it on the bass track and even with the default 40Hz setting, it immediately adds a beautiful depth to the bass sound.
And now I can't live without the Voice Of God ;-)
Francis Depuydt, owner of Roth Eleven Productions.