A study explored the relationship between the second language (L2) production of the Spanish stop consonants /p/ and /b/. Subjects were native English-speaking students enrolled in an undergraduate Spanish phonetics course. Data were collected on their production of Spanish /p,b/ in sentence context, and on their perceptual boundary between the phonemes as reflected by changes in voice onset time (VOT). Mean production and perception VOTs were compared. Results do not reveal a strong correlation between learners' perceptual abilities and production of the L2 Spanish stops. In particular, while some learners' L2 productions approximated those of native Spanish speakers, their perceptual boundaries were similar to boundaries for monolingual English speakers, and vice versa. (MSE)