Overall spin-averaged SED of EX Hya, displayed as log (Ef_E) vs log E. Black curve, labeled OBS: observed spectrum from the K-band to the Lyman edge of Fig. 3, left panel. Red curve, labeled SEC: the secondary star represented by the spectrum of Gl473AB, adjusted by a factor of 580 (BR08). Green curve, labeled WD: spectrum of the compressionally heated WD represented by a model with solar abundances and T_eff = 12 000 K (see text). Blue curve, labeled PC: spectrum of the heated pole cap of the WD, represented by a WD spectrum of 25 000 K (see text). The X-ray part of the SED is taken from the right panel of Fig. 3.