Rekordbox lower track level

When I analyse my tracks to export these for CDJ use, some of these have a very low level and it's earable on the rekordbox player.

The low level doesn't come from the track itself because I can't here a difference while playing it on my computer player (VLC).

It doesn't come from the file type either because it's happening on AIFF files wich is the type of all my other (well analyse) tracks.