The class of voiced obstruents, /b, d, g/, have different articulatory and acoustic realizations and are subject to different allophonic processes in Spanish and English. This paper reports the findings of a study designed to address the production of the Spanish voiced obstruents in intervocalic position by three groups of learners: fourth-semester Spanish students, graduating Spanish majors, and Ph.D. students. Productions were analyzed acoustically, and significant differences were found between the different learner groups, with the more advanced learners producing spirants regularly. This study additionally considered the effect of the surrounding linguistic context; production was found to differ based on orthography, syllable stress, and position of the phoneme within the word.