The DAFNE soft x-ray beamline, DXR-1, is mainly dedicated x-ray absorption spectroscopy. The x-ray source is one of the 6-poles planar wiggler devices installed at the DAFNE electron ring for the vertical beam compaction. Due to the wiggler higher magnetic field, with respect to the bending magnet one, the critical energy of the emitted synchrotron radiation spectrum moves from 219 eV (about 57 Å) to about 296 eV (about 42 Å) with a useful flux for x-ray measurements (due to the very high electron current) well beyond ten times the critical energy. The beamline is equipped with a Toyama double-crystal monochromator in ‘boomerang’ geometry, to ensure a fixed beam exit at all achievable energies. Making a selection between the available crystals (Beryl, KTP, InSb, Si and Ge) all light atomic elements from Na to Cl can be studied.