Focusing on the teaching of listening strategies to second language (L2) learners, this study sought to revisit Renandya and Farrell’s (2011) claims that explicit listening strategy instruction for lower-proficiency learners of English as a foreign language (EFL) is a fruitless endeavor. As such, we implemented a quasi-experimental study to measure the effectiveness of a metacognitive intervention for a convenience sample of lower-proficiency (CEFR A2) Japanese university EFL learners (n = 129). The training program focused on an explicit process-based approach, involving integrated experiential learning tasks and guided reflections, to develop learners’ L2 listening skills. Data collection consisted of TOEIC® test scores, listening comprehension tests, cloze tests, a listening self-efficacy questionnaire, and a post-treatment survey. While the training program was received favorably by students, and students displayed a slightly more confident stance towards listening in their L2, we were unable to find any strong empirical evidence that our lower-proficiency EFL learners’ listening performance improved. As such, these results provide evidence of a potential proficiency threshold for EFL learners to start to benefit from a strategy-focused metacognitive intervention.