Comparison between the outflowing gas electron densities extracted using the DDD presented in Fig. 5 (n_e tr) and the Baron & Netzer (2019b) calibration (n_e Baron19). The n_e Baron19 have been extracted using both the Heckman et al. (2004) (empty circles) and the Lamastra et al. (2009) (filled circles) calibrations for the L_BOL. Different galaxies have different colours following the convention showed in the legend in upper left part. The dotted line marks the 1:1 relation and the shaded areas a scatter of 0.5 and 1 in log n_e. The errors do not take into account the scatter of the L_BOL calibration.