This paper investigates the acoustic properties of the combinations of a consonant and a labiovelar glide (Cw combinations), and shows that the universally favored and disfavored consonant places for Cw combinations exhibit the most and the least acoustic cues for C-Cw contrast, respectively. Spanish and Korean, different in how they phonetically implement the Cw combinations (one a consonant cluster and the other a labialized consonant), are used as subject languages.