Violin plot showing the distributions of luminosity values (top) and S/N ratios (bottom) output from the stack for different simulation realisations at various LIM map spectral resolutions. Channel widths with indigo violins are those where the stack aperture width stays constant at 93.75 MHz as the channelisation changes. Orange violins have individual channels larger than 93.75 MHz – their stack apertures are the size of a single spectral channel (the smallest possible size). The grey dashed line indicates the FWHM of the stack linewidth.