Rest-frame spectral energy distributions (SEDs) for median LOFAR radio-detected quasars stacked according to redshift. Black points plot the observed flux densities with downward-pointing fuchsia arrows indicating 5σ upper limits. The solid blue line shows the combined best-fit SED model, while the purple, green and orange lines show the synchrotron, black-body, and AGN best-fit components, respectively. The maroon squares indicate the predicted fluxes according to the fitted SED model. The cyan points denote the fluxes of the quasars used in the stacking.