It is not possible to make the bass level the same on every song. No two songs are going to have the exact same frequencies at the exact same points in time.
If the intent is to try to make all the songs have roughly the same average level, see if Audition has an 'RMS normalization' feature. RMS normalization is a form of compression but you specify the level.
If you want to emphasize certain frequency ranges (say 50 Hz to 200 Hz) across all songs, you'll have to use the parametric equalizer. Once you get the parameters that work ok, save it as a preset if Audition has such a feature, and then apply the same curve over all the other songs.
Having said all of that, I'd still recommend that you do NOT do any of it. The cardinal rule of audio editing is to do the absolute minimum number of editing steps as each process subtly degrades the audio. Some things are better left to post-processing during playback and increasing the bass is one such process that is better done during playback.
I've been using Sound Forge for at least ten years now and originally my goal was similar - rip tracks from CDs, process them if necessary, and save the WAVs as part of my digital audio archive. The theory being that I would then have a 'pristine' digital copy and would never have to rip the CD again. The reality is that you only want to do minor edits like split/join tracks, fade-in, fade-out, etc. Do not normalize, compress, EQ, etc the original track. Save the original track unedited (except for the minor edits above), make a copy, and then mess with the copy. You then have the original to fall back on for further edits.
I'd love to discuss what should and shouldn't be done but perhaps it would be better to have a new thread devoted solely to audio editing techniques.
