Outflow velocities v_out and v_max (left and middle panels) as a function of L_bol, and v_out/L_bol ratios vs. X-ray N_H measurements (right panel). The coloured crosses and grey squares represent SUPER type-2 and type-1 AGN, and the triangles in the right panel indicate upper and lower limits to N_H. The dash-dotted blue lines represent our best-fit linear relation to the type-1 measurements, from which the type-2 points depart increasingly at decreasing L_bol (the mean deviation is 0.4dex). In the middle panel, we draw the empirical relation by Fiore et al. (2017) for comparison (dotted line), along with a more recent version from Musiimenta et al. (2023) (dashed). The orange shading in the left and middle panels marks the low-L_bol range (i.e. L_bol = 10^{44.8 − 46.5} erg s⁻¹), where we compare the type-1 and type-2 AGN measurements. In the right panel, we consistently use light orange markers to identify type-1 AGN in the low-L_bol regime.