  Within the context of investigating possible differences between the
mechanisms at play in Radio Loud AGN and those in Radio Quiet ones, we study
the spectral characteristics of a selected sample of Intermediate-Luminosity
Broad-Line Radio Galaxies in X-rays, optical, IR and radio. Here, we present
the radio spectra acquired with the 100-m radio telescope in Effelsberg between
2.6 and 32 GHz. These measurements reveal a large variety of spectral shapes
urging for radio imaging that would disclose the source morphology. Such
studies could potentially discriminate between different mechanisms.
