The prototype DcrCoadd generation code used the same filter transmission curve as the input simulations, and was able to recover the input spectra of individual simulated sources accurately. The new stackified DcrCoadds use a simple top hat transmission curve (until DM-13668 is completed), and are not able to recover the input simulated source spectra as well. This ticket is to investigate the effect of the filter transmission on the accuracy of the recovered source spectra.