If you’re like us and don’t know the first thing about Cumbia music but have been meaning to check it out for a while now, Secret Stash just announced a killer reissue of Constelacion, a prized Los Destellos LP from 1971. Check out a trailer for the Peruvian album—available in a limited purple splatter pressing if you pre-order it now—after the jump, alongside a free MP3 of the title track…