Comparison between the observed MIR-normalised rest-frame SEDs of the PAH galaxies (taken from Fig. 14; top) and the absorbed and unabsorbed NGC 6090 SEDs (bottom). The unabsorbed (τ(9.7 μm)=0.0) NGC 6090 SED (taken from Fig. 22) and the similar but absorbed (τ(9.7 μm) = 3.0) one are shown in black and red, respectively, in the bottom panel. We use the reconstructed SEDs from the synthetic catalogues. In addition, a full-resolution original (unabsorbed) NGC 6090 SED and an extinction curve for τ(9.7 μm) = 3.0 (with an arbitrary offset) are shown for reference. The normalisation wavelength (7.7 μm) and the wavelength of 11.3 μm are indicated by black solid and broken vertical lines, respectively, in each panel.