Do they provide any equalizer availabilty at all?
You need to google for that and see if there are any plugins that support PE.
If you film a lost of concerts I would consider a more professional software package like Premiere Pro.
While it is not a plug-in for the program, the free download Audacity includes a very powerful equalizer.
Sony SoundForge Studio is an affordable audio editor with a very powerful tool set.
And, for professional work, Adobe Audition is a top of the line audio editor.