  We present the results of the comparative analysis of the most known
semi-empirical and empirical spectral atlases that was carried out using the
data from the WBVR photometric catalogue. The results show that standard error
of synthesized stellar magnitudes calculated with SEDs from best spectral
atlases reaches 0.02 mag. It has been also found out that some of modern
spectral atlases are burdened with significant systematic errors. The agreement
for the 5000-10000 A spectral range is rather satisfactory, while there are
problems for wavelengths shorter than 4400 A.
