If you find dialog is difficult to understand you might try adding a sonic maximizer (for example Behringer Sonic Ultramizer or BBE Maximizer), a sonic exciter

If you find dialog is difficult to understand you might try adding a sonic maximizer (for example Behringer Sonic Ultramizer or BBE Maximizer), a sonic exciter (Behringer Sonic Exciter or Aphex Aural Exciter), and maybe a little compression and plate reverb.