Integrated spectra of the cluster and 3C 197.1. Both flux densities with (circles) and without (triangles) point source subtraction are reported in the case of Abell 655. We note that for the LBA flux densities, the contribution of point sources to the total flux density is negligible, which means that the data with and without subtraction of point sources are indistinguishable within the uncertainties. The dotted line represents a power-law spectral profile fitted to the point-source subtracted flux density, and it gives an indication of the steepness of the spectrum of A655, with a spectral index of α = −1.71 ± 0.16. The radio spectrum of 3C 197.1 is that of a regular AGN, with a spectral index of α = −0.68 ± 0, 02, which allows us to determine the validity of our LOFAR flux density measurements.